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

Author

Michel Marcus, Aug 30 2020

Keywords

• nonn
• more

Comments

127 is a term.

Examples

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

Links

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

Crossrefs

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

Programs

PARI

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