1 928 207 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
152596530979779280317151	24	77.0	2022-02-17 11:37:43
2511680180800080268926719	25	81.1	2016-03-10 19:55:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	133 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ian W Halliday	5C712485B8EC2407	0
Verified (Factored)	1999-01-17	René Cohlst	5C712485B8EC2407	785368
Verified (Factored)	2015-07-01	MadPoo	5C712485B8EC2407	1775903

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	FE488C0224CC4EDA	1	0	1	3
Verified (Factored)	2017-11-10	kkmrkkblmbrbk	FE488C0224CC4EDA	1	1373306	1	3
Verified	2022-02-22	LordJulius	DD7025A51AB2FC7F	2	1645822	5	3

History

Date	User	Type	Result
2022-02-22	Team_Inspector	CERT	PRP Certification Proof certified good
2022-02-22	LordJulius	C-PRP	M1928207/152596530979779280317151/2511680180800080268926719 : DD7025A51AB2FC7F PRP proof power = 7 PRP: Verified Proof certified good
2022-02-17	TJAOI	F-ECM	Factor: 152596530979779280317151 / (ECM curve 45, B1=50000, B2=6600000)
2017-11-10	kkmrkkblmbrbk	C-PRP	M1928207/2511680180800080268926719 : FE488C0224CC4EDA PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1928207/2511680180800080268926719 : FE488C0224CC4EDA PRP: Verified (Factored) PRP without proof (not generated)
2016-03-10	bam	F-ECM	Factor: 2511680180800080268926719 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-08	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-01	MadPoo	C-LL	5C712485B8EC2407
2015-05-17	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-17	snme2pm1	NF	no factor from 2^63 to 2^64
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-02-09	S485122	NF	no factor from 2^60 to 2^61