2 897 173 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
122703731228801956783441	24	76.7	2015-12-20 04:33:23

ECM

Digits	B1	Curves
25	50000	11 / 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)		Thomas Honold	04BA1DB38D9AC165	0
Verified (Factored)	1999-12-01	LORRAIN thomas	04BA1DB38D9AC165	1239423

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	A7D36914E7B5BBCE	1	0	1	3
Verified	2017-11-16	Oliver Kruse	A7D36914E7B5BBCE	1	2786736	1	3

History

Date	User	Type	Result
2023-04-16	Kevin_9611	NF-PM1	B1=240000, B2=279852300
2017-11-16	Oliver Kruse	C-PRP	M2897173/122703731228801956783441 : A7D36914E7B5BBCE PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2897173/122703731228801956783441 : A7D36914E7B5BBCE PRP: Verified PRP without proof (not generated)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-12-20	bam	F-ECM	Factor: 122703731228801956783441 / (ECM curve 2, B1=50000, B2=5000000)
2015-04-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-10	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-02-22	Carsten Kossendey	NF-PM1	B1=200000, B2=5000000, E=6
2010-12-24	Joss	NF-PM1	B1=20000
2009-08-13	Carsten Kossendey	NF-PM1	B1=15000, B2=168750
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61