olemus
algarv kujul 2p+1, kus p on samuti algarv
= prime of the form 2p+1, where p is also prime

rakendusi
Diffie ja Hellmani võtmekehtestus

ülevaateid
https://planetmath.org/safeprime

https://en.wikipedia.org/wiki/Safe_and_Sophie_Germain_primes

https://www.degruyter.com/document/doi/10.1515/jmc-2013-5011/pdf

vt ka
- tugev algarv