Primes formed by the concatenation of 2^k-1 and 2^(k-1)-1.
A298613
Primes formed by the concatenation of 2^k-1 and 2^(k-1)-1.
Terms
- a(0) =31a(1) =73a(2) =157a(3) =12763a(4) =255127a(5) =40952047a(6) =524287262143
External references
- oeis: A298613
A298613
Primes formed by the concatenation of 2^k-1 and 2^(k-1)-1.