2 027 401 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
143025260171480513987287	24	76.9	2020-03-27 19:31:24

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	161 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Michael Giering	6C2FC3E321FB7BC7	0
Verified (Factored)		Aaron Gilliland	6C2FC3E321FB7BC7	0
Verified (Factored)	1999-07-04	Bruce Mitchell	6C2FC3E321FB7BC7	1151698

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-28	Christoph Zenger	307CA5E563DC5A04	1	1358682	5	3
Verified	2020-03-30	Alvin Bunk	307CA5E563DC5A04	1	1139344	5	3

History

Date	User	Type	Result
2020-03-30	Alvin Bunk	C-PRP	M2027401/143025260171480513987287 : 307CA5E563DC5A04 PRP: Verified PRP without proof (not generated)
2020-03-28	Christoph Zenger	C-PRP	M2027401/143025260171480513987287 : 307CA5E563DC5A04 PRP: Verified PRP without proof (not generated)
2020-03-27	MarkS	F-ECM	Factor: 143025260171480513987287 / (ECM curve 1, B1=50000, B2=5000000, Sigma=5193405058669694)
2019-04-06	mikr	NF-PM1	B1=4000000, B2=200000000, E=12
2019-03-20	chuenkit	NF	no factor from 2^67 to 2^68
2016-07-06	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
2015-10-31	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-13	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-13	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-10-18	David Campeau	NF-PM1	B1=580000, B2=15080000, E=12
2013-02-21	dbaugh	NF	no factor from 2^62 to 2^63
2010-12-14	Joss	NF-PM1	B1=202740
2010-02-17	BloodIce	NF	no factor from 2^61 to 2^62
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61