A240113 Integers for which the smallest m in A040081 such that n*2^m - 1 is prime (A038699) increases.

1, 13, 23, 43, 59, 88, 127, 148, 659

Offset: 1

Author

Arkadiusz Wesolowski, Apr 01 2014

Keywords

• nonn
• more

Comments

Where records occur in A040081. A103963 gives the record values.

The next candidate is 2293.

Links

• Wilfrid Keller, The Riesel Problem: Definition and Status

Crossrefs

Cf. A038699, A040081, A103963.

Programs

PARI

a=0; for(n=1, 148, m=0; while(!ispseudoprime(n*2^m-1), m++); if(m>a, a=m; print1(n, ", ")));