[XPM] [ANN] Primecoin Release - First Scientific Computing Cryptocurrency

[Aggrophobia]

I'm not a mathemetician but my understanding is that

A) There's essentially an unlimited number of primes. Even when youre talking numbers hundreds of digits long, yoiu'll still find primes in them pretty regularly (every couple hundred digits or so).

B) Primecoin isn't even trying to find the biggest primes out there - indeed if it was and did, Sonny would qualify for some pretty big reward money

I have a feeling that the biggest primes are safe since the top 10 are all Mersenne Primes found by GIMPS.  Primecoin has helped find record Cunningham primes in the 120-160 digit length, GIMPS' record is something like 17 million digits.  The next reward from EFF is for a 100,000,000+ digit prime ($100,000) and a 1,000,000,000+ digit prime ($150,000).

means (2^332.xxx.xxx)-1 , to confirm that a number this large is prime with LL would need 2000 hours with a GTX Titan or 3400 hours with an 8-core CPU
now you have to see that the chance to find a Mersenne Prime in that range is 1 : 370000 (many candidates are proven composite with trialfactoring)
so normally it would need ~168.000 years for one person to find a 100,000,000+ digit prime, try your luck

[Stinky_Pete]

Primecoin isn't trying to find all primes, even small ones. It is looking for Cunningham chains (and, no, I don't know what they are either)

[bcp19]

I'm not a mathemetician but my understanding is that

A) There's essentially an unlimited number of primes. Even when youre talking numbers hundreds of digits long, yoiu'll still find primes in them pretty regularly (every couple hundred digits or so).

B) Primecoin isn't even trying to find the biggest primes out there - indeed if it was and did, Sonny would qualify for some pretty big reward money

I have a feeling that the biggest primes are safe since the top 10 are all Mersenne Primes found by GIMPS.  Primecoin has helped find record Cunningham primes in the 120-160 digit length, GIMPS' record is something like 17 million digits.  The next reward from EFF is for a 100,000,000+ digit prime ($100,000) and a 1,000,000,000+ digit prime ($150,000).

means (2^332.xxx.xxx)-1 , to confirm that a number this large is prime with LL would need 2000 hours with a GTX Titan or 3400 hours with an 8-core CPU
now you have to see that the chance to find a Mersenne Prime in that range is 1 : 370000 (many candidates are proven composite with trialfactoring)
so normally it would need ~168.000 years for one person to find a 100,000,000+ digit prime, try your luck

I used 2 cores of an i5 2500k on such a number and it took over 200 days to complete.  Using an 8 core CPU would be a huge power waste for very little speed gain.  The P95 program is very efficient, so memory bandwidth becomes an issue.  In addition, each iteration depends on the one prior, so parallelation is impossible.  IIRC, on my 2500k, using a single core would run at 144ms per iteration, 2 cores at 75ms, 3 cores at 60ms and all 4 core 55ms.  VERY inefficient with multiple cores.

[mustyoshi]

ypool is basically finding all the blocks at this point.

[eule]

I wish they'd release their code soon. 

[sumantso]

ypool is basically finding all the blocks at this point.

Just my luck. Was getting nothing soloing and then joined the pool and bam - found a block (92113). Should have just kept soloing a bit more 

[bitdraw]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

[dreamwatcher]

http://cryptocoinexplorer2.com:5555/

I have put up a live alpha/beta of Explorer III.

This is a PrimeCoin Explorer.

-At this stage only the basic explorer is online, none of the extra features are active yet.

-Search function is not implemented yet, however the URL scheme is simple, and searching by hand quite easy.

-There are a couple of known bugs - for example the transactions on some blocks do not show correctly.

-Spent output field in the transaction page is not implemented yet

This is strictly a testing stage, so expect the explorer to be up and down as bugs are fixed and features are added.

Main CCE Explorer III update thread:
https://bitcointalk.org/index.php?topic=262539.0

[saamxx]

Where  i can download x86 xpm wallet?
The link on the OP - https://sourceforge.net/projects/primecoin/files/ -returned me Whoops....

[tinnvec]

I wish they'd release their code soon. 

The source code is available on ypool's page, as well as the source code for the unofficial jhPrimeminer in a thread here on bitcointalk

[Sunny King]

Sourceforge project is missing for some reason, just filed a support request here:

https://sourceforge.net/p/forge/site-support/4918/

[Sunny King]

Where  i can download x86 xpm wallet?
The link on the OP - https://sourceforge.net/projects/primecoin/files/ -returned me Whoops....

The official download is down, thanks for reporting this. You can use mikael's high-performance build here:

https://bitcointalk.org/index.php?topic=255782.0

[mikaelh]

You should set CXXFLAGS like this:

Code:

make -f makefile.unix CXXFLAGS="-march=native -O3"

[eule]

I wish they'd release their code soon.  

The source code is available on ypool's page, as well as the source code for the unofficial jhPrimeminer in a thread here on bitcointalk

Was talking about the pool code. I'd love a p2pool, if that's possible at all.

[Lauda]

Interesting reads on this thread, it takes only forever to read everything 

[RustyShackleford1950]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

Yep, solo blocks can still be found, even on a low spec PC, like an i3.

[zax983]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

Yep, solo blocks can still be found, even on a low spec PC, like an i3.

Don't LIE man! Not force people to waste time, power and hope... I can't find block with i3-2125 from a month !!! What is the chance now, any like 0.000000001% or I'm just unlucky (easy to said, but I not trust).

[xyzzy099]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

Yep, solo blocks can still be found, even on a low spec PC, like an i3.

Don't LIE man! Not force people to waste time, power and hope... I can't find block with i3-2125 from a month !!! What is the chance now, any like 0.000000001% or I'm just unlucky (easy to said, but I not trust).

You forgot to ask for a donation this time.  You're slipping.

[bcp19]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

Yep, solo blocks can still be found, even on a low spec PC, like an i3.

Don't LIE man! Not force people to waste time, power and hope... I can't find block with i3-2125 from a month !!! What is the chance now, any like 0.000000001% or I'm just unlucky (easy to said, but I not trust).

It's not a lie dumbass, if you had 1000 i3's crunching away you'd be amazed at your results.

YPool is has found ~157 of the ~700 blocks in the last 12 hours.  That's ~22% from 5500 workers.  If this is accurate, that means ~11,000 computers crunching data on the network. 1 in 11,000 odds means 1 block every ~9 days for the average computer (probably 1 in 18-25 days on your crappy i3)

[masterOfDisaster]

ypool is basically finding all the blocks at this point.

some friends and i still find blocks solo mining, everything is fine

Yep, solo blocks can still be found, even on a low spec PC, like an i3.

Don't LIE man! Not force people to waste time, power and hope... I can't find block with i3-2125 from a month !!! What is the chance now, any like 0.000000001% or I'm just unlucky (easy to said, but I not trust).

Please don't shout and please, please, please, don't call others liars because of your bad luck.
...and although I feel this is a waste of time, I can just not stand your attitude. Just to prove that you need no Blue Gene acess to solve blocks: I recently solved a block on a very low power virtual machine (as you might or might not be able to derive from the numbers)...

Code:

primecoind getmininginfo
{
    "blocks" : 93529,
    "chainspermin" : 0,
    "chainsperday" : 0.01616312,
    "currentblocksize" : 1000,
    "currentblocktx" : 0,
    "difficulty" : 9.19682842,
    "errors" : "",
    "generate" : true,
    "genproclimit" : -1,
    "roundsievepercentage" : 30,
    "primespersec" : 84,
    "pooledtx" : 0,
    "sievepercentage" : 10,
    "sievesize" : 400000,
    "testnet" : false
}
primecoind listtransactions
[
    {
        "account" : "",
        "address" : "ANjyLV7yQw9z8i12D6LtQDWUB4VmG45Dfi",
        "category" : "immature",
        "amount" : 11.68000000,
        "confirmations" : 3153,
        "generated" : true,
        "blockhash" : "bd839d019f78ce1a1c1769de40b51f93819a5b17bf022b16194f0b66a4c89af8",
        "blockindex" : 0,
        "blocktime" : 1375235888,
        "txid" : "65f9c58291589b8c22b45f951a02ba46629af2927789b7aaa5e122e4eb6e02cf",
        "time" : 1375235888,
        "timereceived" : 1375235888
    }
]

cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Xeon(R) CPU E3-1225 V2 @ 3.20GHz
stepping        : 9
cpu MHz         : 798.191
cache size      : 8192 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 4
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand lahf_lm ida arat xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms
bogomips        : 6385.53
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual

Hey, almost transitioned from "immature" to "generate".

[edit]

Code:

primecoind listtransactions
[
    {
        "account" : "",
        "address" : "ANjyLV7yQw9z8i12D6LtQDWUB4VmG45Dfi",
        "category" : "generate",
        "amount" : 11.68000000,
        "confirmations" : 3200,
        "generated" : true,
        "blockhash" : "bd839d019f78ce1a1c1769de40b51f93819a5b17bf022b16194f0b66a4c89af8",
        "blockindex" : 0,
        "blocktime" : 1375235888,
        "txid" : "65f9c58291589b8c22b45f951a02ba46629af2927789b7aaa5e122e4eb6e02cf",
        "time" : 1375235888,
        "timereceived" : 1375235888
    }
]

[/edit] ...just for the record and just in time (ok, I was continuously watching on that to happen ) And just to show that blocks can be generated even with low power virtual machines!