Thread: Other Primes
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Old 2022-02-01, 22:23   #304
ryanp
 
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Jun 2012
Boulder, CO

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Update: I've completed testing/double-checking \(n!-1\) and \(n!+1\) for \(150000 \le n \le 330000\) and can confirm the only primes are the 4 known as of Jan 2022:

Code:
308084! + 1
288465! + 1
208003! - 1
150209! + 1
Continuing on up to \(n=500000\).
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