This number is a composite.
The twin primes 6797727*2^15328 ± 1 were found on an ordinary IBM-compatible PC with an Intel 486 DX microprocessor.
The only sum of a zeroless pandigital expression involving
the addition of a Mersenne prime and a Sophie Germain
prime, i.e., 127 + 359 = 486. [Gaydos and
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