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Old 2021-02-26, 19:25   #15
charybdis
 
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Apr 2020

10716 Posts
Default 2,2786M c219 = p56 * c163 (GNFS in progress)

Can confirm that ECM is very much worthwhile:

Code:
Input number is 112962684910978005979707883110687425334751394055520879404011959657332843602530827086693504635422750727754158030487431949129607839267073568635226319122113659002180679302496838174314943902966481942043022475798041473053257 (219 digits)
Using B1=400000000, B2=4767896883766, polynomial Dickson(30), sigma=1:950355941
Step 1 took 887735ms
Step 2 took 208937ms
********** Factor found in step 2: 18079030929723990295640293502821337497340759521793530157
Found prime factor of 56 digits: 18079030929723990295640293502821337497340759521793530157
Composite cofactor 6248271013533942187625468605111142926663041596213979398984907236621613347487386335033546137192022175920901985083517768960203749984569259931558968042151449551468301 has 163 digits
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