20 005 649 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
13207874877329586761907842161	29	93.4	2022-01-17 15:47:02

ECM

Digits	B1	Curves
25	50000	12 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		ROLAND BOCKHORST	55A92963EC585520	7602560
Verified (Factored)	2007-10-29	Ars Technica Team Prime Rib	55A92963EC585520	588095

History

Date	User	Type	Result
2022-01-17	ATH	F-PP1	Start=2/7, B1=1000000, B2=27000000, Factor: 13207874877329586761907842161
2021-05-25	-Anonymous-	NF	no factor from 2^73 to 2^74
2021-05-22	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-05-22	-Anonymous-	NF	no factor from 2^71 to 2^72
2019-01-14	slaur	NF	no factor from 2^70 to 2^71
2017-03-14	ramgeis	NF	no factor from 2^69 to 2^70
2016-01-21	mikr	NF	no factor from 2^68 to 2^69
2016-01-21	mikr	NF	no factor from 2^67 to 2^68
2011-07-13	Xyzzy	NF	no factor from 2^66 to 2^67