8 132 561 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
1154697432241984110775759	25	79.9	2019-02-20 00:16:22

ECM

Digits	B1	Curves
25	50000	4 / 280

Estimated T-Level: 20.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	2000-01-19	Jeff Runaldue	D80237369D005375	5312640
Verified (Factored)	2002-08-17	Marc Getty / Phil Fizur	D80237369D005375	3785774

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-02-20	ATH	238A8B83CC1379BD	1	2431811	5	3
Verified	2020-02-15	oodaira	238A8B83CC1379BD	1	4570665	5	3

History

Date	User	Type	Result
2023-05-08	Flaukrotist	NF	no factor from 2^68 to 2^69
2023-02-05	Flaukrotist	NF-PM1	B1=2200000, B2=1771615560
2020-02-15	oodaira	C-PRP	M8132561/1154697432241984110775759 : 238A8B83CC1379BD PRP: Verified PRP without proof (not generated)
2019-02-20	ATH	C-PRP	M8132561/1154697432241984110775759 : 238A8B83CC1379BD PRP: Verified PRP without proof (not generated)
2019-02-20	alex	F-ECM	Factor: 1154697432241984110775759 / (ECM curve 1, B1=50000, B2=5000000)
2018-07-04	chuenkit	NF	no factor from 2^67 to 2^68
2015-12-01	snme2pm1	NF	no factor from 2^66 to 2^67
2015-05-26	snme2pm1	NF	no factor from 2^65 to 2^66
2013-12-26	David Campeau	NF	no factor from 2^64 to 2^65
2013-09-20	Axelsson	NF	no factor from 2^63 to 2^64
2012-10-21	Nesowa	NF-PM1	B1=100000, B2=1975000, E=6