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Old 2021-09-27, 16:56   #3
Dr Sardonicus
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Feb 2017

10011111101112 Posts

D'oh! Of course! 233 is 8589934592, or almost 8.6 billion! There are plenty of Mp whose character (prime or composite) is unknown, with p < 233. This is likely to remain true for some time to come.
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