2 134 507 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
423988538165520664528943	24	78.5	2021-06-20 11:25:18

ECM

Digits	B1	Curves
25	50000	178 / 280

Estimated T-Level: 23.2 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Holger Lange	CC225A275D31240E	0
Verified (Factored)	1999-02-07	Morten Ringvold	CC225A275D31240E	652651
Verified (Factored)	2018-04-06	kkmrkkblmbrbk	CC225A275D31240E	1104481

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-21	kutens	CA08969D8D3E0A05	1	1491947	5	3

History

Date	User	Type	Result
2021-06-21	Haiyung	CERT	PRP Certification Proof certified good
2021-06-21	kutens	C-PRP	M2134507/423988538165520664528943 : CA08969D8D3E0A05 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-20	kutens	F-ECM	Factor: 423988538165520664528943 / (ECM curve 7, B1=50000, B2=6450000, Sigma=7626453518310400)
2019-04-22	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-06	kkmrkkblmbrbk	C-LL	CC225A275D31240E
2017-10-04	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-10-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-11-13	c10ck3r	NF-PM1	B1=500000, B2=10000000, E=12
2013-02-21	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-15	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-11-25	Oscar Östlin	NF-PM1	B1=80000, B2=1500000, E=6
2010-10-25	Oscar Östlin	NF-PM1	B1=75011
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61