4 006 333 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
720987230884185534870238439	27	89.2	2021-05-25 01:14:07

ECM

Digits	B1	Curves
25	50000	17 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Arend Jan Poelarends	F22B593468E5BF94	0
Verified (Factored)	1999-12-30	Thomas Philipp	F22B593468E5BF94	3423189

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-30	RichD0	F21DBA9540057449	1	2219627	5	3

History

Date	User	Type	Result
2021-05-30	Eric Clements	CERT	PRP Certification Proof certified good
2021-05-30	RichD0	C-PRP	M4006333/720987230884185534870238439 : F21DBA9540057449 PRP proof power = 7 PRP: Verified Proof certified good
2021-05-25	ATH	F-PP1	Start=2/7, B1=2500000, Factor: 720987230884185534870238439
2019-04-11	mikr	NF	no factor from 2^69 to 2^70
2019-04-11	mikr	NF	no factor from 2^68 to 2^69
2018-08-29	mikr	NF	no factor from 2^67 to 2^68
2017-10-22	mikr	NF-PM1	B1=4600000, B2=125000000, E=12
2016-08-28	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-05-15	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-01	Nesowa	NF-PM1	B1=225000, B2=4556250, E=6
2013-10-20	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-30	Squeeky_Squirrel	NF-PM1	B1=120000, B2=2280000, E=6
2013-07-22	Jayder	NF	no factor from 2^63 to 2^64
2013-02-08	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1056250, E=6
2010-01-02	Squeeky_Squirrel	NF-PM1	B1=40000, B2=600000, E=4
2009-11-06	GrunwalderGIMP	NF	no factor from 2^1 to 2^63