3106
This number is a composite.
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The successive Mersenne primes M_2203 and M_2281 have the same sum of digits, i.e., 3106. Could this happen again for the other successive Mersenne primes? [Suzanna]
Submitted: 2019-04-08 07:16:39; Last Modified: 2019-04-08 09:58:27.
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