A283266 Prime numbers p such that 2^p - 3 is prime.

3, 5, 29, 233, 42689, 69337

Offset

1,1

Comments

Let W = 2^p - 3 and s = (W+1)/(2*p), then 3^s == -2 (mod W) for terms 1..6.

a(7) > 2086750 using A050414. - Michael S. Branicky, Jan 27 2025

Links

Table of n, a(n) for n=1..6.

Prog

(PARI)
forprime(p=2, 10^5, W= 2^p-3; if(ispseudoprime(W), print1(p, ", ")))

Crossrefs

Prime terms in A050414.

Sequence in context: A176951 A082716 A352295 * A060255 A316791 A154552

Adjacent sequences: A283263 A283264 A283265 * A283267 A283268 A283269

Keyword

nonn,more

Author

Dmitry Ezhov, Mar 04 2017

Status

approved