39717...98317 (27-digits)

This number is a prime.

3971783 2971415953 4771298317

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This prime is formed from the concatenation in order of all the primes 397, 1783, 2971, 4159, 5347, 7129, 8317, that are also concatenated from two primes summed to a hundred, i.e., (3, 97), (17, 83), (29, 71), (41, 59), (53, 47), (71, 29), (83, 17). [Loungrides]

Submitted: 2013-10-18 14:11:16; Last Modified: 2019-06-30 18:33:57.