91
This number is a composite.
Just showing those entries submitted by 'Luhn': (Click here to show all)
10n + 91 {+ 0, + 2} are twin primes for n = 1, 2, 3 and 4. [Luhn]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
Just showing those entries submitted by 'Luhn': (Click here to show all)
10n + 91 {+ 0, + 2} are twin primes for n = 1, 2, 3 and 4. [Luhn]