3 206 561 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
290396776295697174651319	24	77.9	2021-01-11 02:19:41

ECM

Digits	B1	Curves
25	50000	30 / 280

Estimated T-Level: 20.5 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-01-05	Brian Jongekryg	30D6BF127B972DF0	0
Verified (Factored)	2000-02-16	Ole Tange	30D6BF127B972DF0	835648

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-01-11	riccardo uberti	08188E08038482E5	1	2116043	5	3

History

Date	User	Type	Result
2022-09-07	Joss	NF-PM1	B1=1070656, B2=226749600
2022-01-24	Joss	NF-PM1	B1=1070656, B2=119912100
2021-12-13	Joss	NF	no factor from 2^68 to 2^69
2021-01-16	Joss	NF-PM1	B1=320656, B2=3206561, E=6
2021-01-14	Joss	NF-PM1	B1=320656
2021-01-11	Jaron Wakley	CERT	PRP Certification Proof certified good
2021-01-11	riccardo uberti	C-PRP	M3206561/290396776295697174651319 : 08188E08038482E5 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-11	axn	F-ECM	Factor: 290396776295697174651319 / (ECM curve 5, B1=80000, B2=11280000, Sigma=3424924986261753)
2020-01-03	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2019-01-21	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^60 to 2^61
2015-12-05	HBendtz	NF-PM1	B1=500000, B2=12000000, e=12
2015-06-21	Tha	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-06-27	markr	NF	no factor from 2^61 to 2^62