A217198 A sequence of odd primes p such that 2p-1 is prime and no p is equal to any 2q-1 with q in the sequence.

3, 7, 31, 37, 97, 139, 157, 199, 211, 229, 271, 307, 331, 337, 367, 379, 439, 499, 547, 577, 601, 607, 619, 691, 727, 811

Offset: 1

Author

Michel Marcus, Sep 27 2012

Keywords

• nonn

Comments

Sequence used in conjunction with A001259 in the referenced articles.

It is not clear that this sequence is correct -- it certainly does not match the title. See A217199 for the correct version. - T. D. Noe, Sep 28 2012

Links

• A. Schinzel and Andrzej Wakulicz, Sur l'équation phi(x+k)=phi(x), I., Acta Arith. 4 (1958), 181-184.
• A. Schinzel and Andrzej Wakulicz, Sur l'équation phi(x+k)=phi(x). II. Acta Arith. 5 1959 425-426.

Crossrefs

Cf. A001259, A110581, A217199.