My second sub 20000 ECM Factor of 2017
 

Hand_In_The_Box 14173 F-ECM 2017-06-06 22:21 63.2 5451595560230412055196637501309406085341593764073929 6.5642

Almost 172 bits!!!

[QUOTE=petrw1;460690]Hand_In_The_Box 14173 F-ECM 2017-06-06 22:21 63.2 5451595560230412055196637501309406085341593764073929 6.5642

Almost 172 bits!!![/QUOTE]

Congratulations! What bounds were you running? All P95, or GMP-ECM hybrid?

[QUOTE=VBCurtis;460693]Congratulations! What bounds were you running? All P95, or GMP-ECM hybrid?[/QUOTE]

Thx
Just prime95 to the prescribed bounds.

Great find!
More to come. It´s not yet mid year...:smile:

Not a Mersenne, but a [URL="http://factordb.com/index.php?query=L(59863)"]Lucas factor[/URL], humorously large:

[CODE]Input number is 6569290416...8007744099 (12498 digits)
Using B1=100000, B2=39772318, polynomial x^1, x0=2094478791
Step 1 took 30599ms
Step 2 took 31517ms
********** Factor found in step 2: 52215613273214538217140880496129
Found prime factor of 32 digits: 52215613273214538217140880496129
Composite cofactor [/CODE]

P-1 found a factor in stage #1, B1=685000.
UID: Jwb52z/Clay, M82286773 has a factor: 63196368814656374199671 (P-1, B1=685000)

75.742 bits.

P-1 found a factor in stage #2, B1=685000, B2=13015000.
UID: Jwb52z/Clay, M82336229 has a factor: 32884975554466910081290869271 (P-1, B1=685000, B2=13015000),

94,731 bits.

[QUOTE=Jwb52z;463566]P-1 found a factor in stage #2, B1=685000, B2=13015000.
UID: Jwb52z/Clay, M82336229 has a factor: 32884975554466910081290869271 (P-1, B1=685000, B2=13015000),

94,731 bits.[/QUOTE]

Wow, 94 thousand bits, must be a record!

[QUOTE=Gordon;463614]Wow, 94 thousand bits, must be a record![/QUOTE]Welcome to planet Earth where not everyone follows the same digit grouping conventions.

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"." means a moderation issue, at least when it comes to Seti@home.

Except for that, I am not supposed to be here either.