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Old 2021-01-09, 02:30   #2
Batalov
 
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Mar 2008
Phi(4,2^7658614+1)/2

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An interesting exercise is to eval the probability of such 4-letter occurrence under (more or less adequate) assumption of random nature of residue values' distribution.

Other than that, this is a fairly popular initialization value (to detect memory leaks in one's code or similar) v = 0xDEADBEEF.
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