Primes p of the form k^2 + 1 that divide 4^k - 1.

A274000

Primes p of the form k^2 + 1 that divide 4^k - 1.

Terms

    a(0) =5a(1) =17a(2) =257a(3) =65537a(4) =148997a(5) =405458497a(6) =3497539601

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