Nano Ledger S 24 Word Phrase, Same Word Used Twice?

[jerry0]

I got my nano ledger s from the manufacturer.  I actually had to reset it few times because i wasn't sure if i choose legacy or segwit etc and was told to use segwit.  Each time i wrote a new pin and the 24 word phrase.  Well this time i reset it again and put in new pin. 


Then i noticed something very strange.  Well i did it this time, i noticed that in the 24 word phrase, the same word is used twice.  I had to make sure of this when writing it down because i thought didnt i just write the word down and it did.  So imagine the word is outdoor and it shows that in word number 5 and word number 23.  Is this normal?  i made sure and went back and its the same word but different word numbers.


Can someone confirm this is normal?  I thought well there is a huge word list.  But the other thing is well if the same word is used twice in a 24 word phrase, well that is strange.  Because with 24 word and a huge collection of words, shouldn't there be like an infiinite number of words where the same word doesn't show up twice?

[TryNinja]

Like I said in the other thread, this can happen and there is nothing wrong about it.

From Ledger's VP Operations:

It is likely to happen and doesn't affect security in any way. The 24 words correspond to a 256 bits seed which is split in chunks of 11 bits (each chunk being used as the index in a 2048 words dictionary).

It's purely random and can happen pretty often.

https://www.reddit.com/r/ledgerwallet/comments/7gcmox/duplicate_word_in_24_word_seed/dqi2sda/

[jerry0]

Thanks!