Number42 is a cryptotocurrency using a technology called POS - "Proof of Stake". POS was probably first proposed here by Quantum Mechanic. With Proof of Work, the probability of mining a block depends on the work done by the miner (e.g. CPU/GPU cycles spent checking hashes). With Proof of Stake, the resource that's compared is the amount of Number42 a miner holds - someone holding 1% of the Number42 can mine 1% of the "Proof of Stake blocks".
Number42 official technical info:
Number42 - PoS based cryptocurrency.
- * 10 minutes stake spacing
- * The PoS interest halves every x64 multiply of PoS difficulty
- * Maximum PoS reward is 10 coins for verify transaction on Number42 network