Hi Puzzle hunter,
The puzzle 120 was found using this method:
https://github.com/demining/CryptoDeepTools/tree/main/06KangarooJeanLucPons
#120, 119bits private key [2119,2120-1], 17s2b9ksz5y7abUm92cHwG8jEPCzK3dLnT 1.20BTC
800000000000000000000000000000
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
02CEB6CBBCDBDF5EF7150682150F4CE2C6F4807B349827DCDBDD1F2EFA885A2630
Expected time: ~2 months on 256 Tesla V100.
256 GPU card x 60 days x 24h x 300watts = 110 592 kwh x 0.03$ = 3317$ electricity bills but 256k$ of gpu card ;-)
#125 will be this year too i think