A336720 A336719 with duplicates removed.

3, 7, 31, 127, 8191, 131071, 524287, 2147483647, 4432676798593, 2305843009213693951, 57912614113275649087721, 618970019642690137449562111, 162259276829213363391578010288127, 170141183460469231731687303715884105727, 79638304766856507377778616296087448490695649

Offset: 1

Author

Jeppe Stig Nielsen, Aug 01 2020

Keywords

• nonn

Comments

Also, record values in A005420.

Mersenne primes (A000668) are a subsequence.

For the corresponding orders of 2 (exponents), see A336721.

Crossrefs

Cf. A000668, A005420, A336719, A336721.

Programs

PARI

re=0;for(k=2,+oo,p=vecmax(factor(2^k-1)[,1]);if(p>re,re=p;print1(re,", ")))