89
This number is a prime.
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The smallest Sophie Germain prime to start a Cunningham chain of length 6 (1st kind): (89, 179, 359, 719, 1439, 2879).
Submitted: 1999-09-02 23:40:00; Last Modified: 2008-06-09 16:21:19.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell