13 896 137 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 7 known prime factors. Cofactor is composite.

Trial Factored to 2⁷⁰

TF target 2⁶⁹

Factored

Factor	Digits	Bits	Date
194545919	9	27.5	old
24874085231	11	34.5	2008-09-08 09:41:38
870787528969	12	39.7	2008-09-08 09:41:38
952691360447	12	39.8	2008-09-08 09:41:38
1239174120839	13	40.2	2008-09-08 09:41:38
9216668449799	13	43.1	2012-05-12 19:15:42
1046772071062087	16	49.9	2012-05-12 19:15:42

ECM

Digits	B1	Curves
25	50000	18 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	Certified Good	2020-09-13	M Miller	F1D7C89691AD75A4	7	7380091	5	3

History

Date	User	Type	Result
2023-02-18	This -Anonymous-	NF-PM1	B1=1000000, B2=101000000
2022-11-27	LordJulius	NF	no factor TF: 69-70
2022-11-27	LordJulius	NF	no factor TF: 65-66
2022-11-27	LordJulius	NF	no factor TF: 64-65
2021-08-06	Seth_Tr	NF	no factor TF: 67-68
2020-09-13	Ben Delo	CERT	Proof certified good
2020-09-13	M Miller	C-PRP	Proof Certified Good Proof Power: 8
2019-12-21	Seth_Tr	NF	no factor TF: 68-69
2019-06-18	Seth_Tr	NF	no factor TF: 66-67
2012-05-12	Axon	F	Factor: 1046772071062087
2012-05-12	Axon	F	Factor: 9216668449799
2008-09-08	Will Edgington	F	Factor: 1239174120839
2008-09-08	Will Edgington	F	Factor: 952691360447
2008-09-08	Will Edgington	F	Factor: 870787528969
2008-09-08	Will Edgington	F	Factor: 24874085231