A336581 Mersenne exponents whose corresponding prime can be expressed as the sum of at least two consecutive primes.

5, 7, 13, 17, 61

Offset

1,1

Comments

127 is a term.

Links

Table of n, a(n) for n=1..5.

Carlos Rivera, Puzzle 456. Mersenne Primes as a sum of consecutive primes, The Prime Puzzles and Problems Connection.

Example

5 is a term because 2^5-1 = 7 + 11 + 13.
17 is a term because 2^17-1 = 43669 + 43691 + 43711.

Prog

(PARI) isok(m) = my(p=2^m-1); isprime(p) && isA050936(p);

Crossrefs

Cf. A000043 (Mersenne exponents), A000668, A050936, A067377.

Sequence in context: A073574 A092110 A171518 * A248920 A314325 A086844

Adjacent sequences: A336578 A336579 A336580 * A336582 A336583 A336584

Keyword

nonn,more

Author

Michel Marcus, Aug 30 2020

Status

approved