1 905 437 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
396012414245897988590209	24	78.4	2020-01-18 08:17:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	108 / 640

Estimated T-Level: 25.8 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Thomas Honold	B95CDB64925FAA15	0
Verified (Factored)	1998-12-21	Nuutti Kuosa	B95CDB64925FAA15	1636057
Verified (Factored)	2015-07-14	MadPoo	B95CDB64925FAA15	629922

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-01-23	mnd9	B3BD0D363F685AA7	1	1383408	5	3
Verified	2020-02-06	mnd9	B3BD0D363F685AA7	1	1858959	5	3
Verified	2022-10-06	francijezek	B3BD0D363F685AA7	1	1078028	5	3

History

Date	User	Type	Result
2022-10-06	Joerg Dittmar	CERT	PRP Certification Proof certified good
2022-10-06	francijezek	C-PRP	M1905437/396012414245897988590209 : B3BD0D363F685AA7 PRP proof power = 7 PRP: Verified Proof certified good
2020-02-06	mnd9	C-PRP	M1905437/396012414245897988590209 : B3BD0D363F685AA7 PRP: Verified PRP without proof (not generated)
2020-01-23	mnd9	C-PRP	M1905437/396012414245897988590209 : B3BD0D363F685AA7 PRP: Verified PRP without proof (not generated)
2020-01-18	daveward2005	F-ECM	Factor: 396012414245897988590209 / (ECM curve 3, B1=50000, B2=5000000)
2019-04-26	chuenkit	NF	no factor from 2^67 to 2^68
2017-11-27	mikr	NF-PM1	B1=8000000, B2=320000000, E=12
2017-03-15	Smok_bmv	NF	no factor from 2^66 to 2^67
2015-08-31	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-14	MadPoo	C-LL	B95CDB64925FAA15
2015-05-19	omylist	NF	no factor from 2^64 to 2^65
2015-05-17	omylist	NF	no factor from 2^63 to 2^64
2011-06-09	kurly	NF-PM1	B1=1000000, B2=30000000, E=12
2011-02-07	GrunwalderGIMP	NF	no factor from 2^62 to 2^63
2011-02-07	GrunwalderGIMP	NF	no factor from 2^61 to 2^62
2009-05-25	Architects Cubed	NF	no factor from 2^60 to 2^61