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Sum Three Factorials, Get Exponent (Posted on 2007-07-03) Difficulty: 3 of 5
Determine all possible quadruplets (p, q, r, s) of positive integers with p< = q< = r satisfying the equation p! + q! + r! = 2^s.

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

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re(2): computer findings | Comment 4 of 8 |
(In reply to re: computer findings by John Reid)

The programming language is UBASIC. In addition to the factorial function built in, it has accuracy to over 2000 decimal digits, prime testing functions and rationals kept in their reduced state of numerator and denominator.
  Posted by Charlie on 2007-07-03 11:57:36

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