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Old 2014-10-19, 00:21   #382
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

22·3·7·109 Posts
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Code:
Input number is 1608550670936750111419478126771736663271665036020695975782940705811989227636304687291156859219692040159581879 (109 digits)
Using B1=3000000, B2=5706890290, polynomial Dickson(6), sigma=430807532
Step 1 took 6933ms
Step 2 took 3752ms
********** Factor found in step 2: 23464102473498596821486299358895197735773111065511674123
Found probable prime factor of 56 digits: 23464102473498596821486299358895197735773111065511674123
Probable prime cofactor 68553684197105725041027255924157334653138545522058373 has 53 digits
ALQ49600.
Aliqueit calls these "neat", I think.
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