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15511380746462593381 (another Prime Pages' Curiosity) |
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79228162514264337589248983040 - 15511380746462593381 is a
Riesel number, while an analogous number with the minus sign
replaced by a plus is a Sierpinski number. Note that
15511380746462593381 is a Sierpinski number, too. [Wesolowski]
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