1542

This number is a composite.

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There is conjectured to be only 47 positive integers which are not twice a square number and cannot be written as (twice a nonzero square number) + (odd prime or twice an odd prime). All such numbers > 10 are == 2 mod 3, and the only exception is 1542. [Xayah]

Submitted: 2021-12-22 18:35:47;   Last Modified: 2021-12-22 20:33:08.
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