4003
This number is a prime.
Single Curio View: (Seek other curios for this number)
(4003, 4007) is the largest pair of cousin primes less than a googol, of form (k*10^n+3, k*10^n+7), (case k=4, n=3). [Loungrides]
Submitted: 2014-11-12 19:15:04; Last Modified: 2020-03-01 18:32:47.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell