Primes p such that 2*p-1 and 2^p-1 are both primes.
A172461
Primes p such that 2*p-1 and 2^p-1 are both primes.
Terms
- a(0) =2a(1) =3a(2) =7a(3) =19a(4) =31a(5) =607a(6) =1279a(7) =2281a(8) =44497a(9) =1257787a(10) =13466917
External references
- oeis: A172461