[ June 14, 2000 ]
the C137 composite number from step 74 of HP(49) - or step 73 of HP(77) - using ECM.
See my Homeprime webpage about
'Repeated Factorization of Concatenated Primefactors of the Composite Numbers'
After almost six months of computation on a PII-300, Paul Leyland can reveal that
The two factors are respectively
My compliments to you, Paul ! go directly to step 74
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