7772777
This number is a prime.
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The only near-repdigit seven-digit palindromic wing prime
such that the product of itself and all truncations of
itself minus one, i.e.,7772777*777277*77727*7772*777*77*7-1
= 1528503743076224921408830427 is prime. [Bajpai]
Submitted: 2020-11-30 20:02:51; Last Modified: 2020-11-30 21:14:26.
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