1 877 471 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
2361570893288808776950667993	28	90.9	2023-11-20 12:22:46
41993417944338771442273592089	29	95.1	2016-02-20 11:16:57

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)	1998-02-01	MIT Prime Team	2E274CFE8C771420	0
Verified (Factored)	1999-01-10	Brian Scearce	2E274CFE8C771420	346691
Verified (Factored)	2015-06-28	MadPoo	2E274CFE8C771420	270973

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	8FD721786E9B1095	1	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	8FD721786E9B1095	1	478085	1	3
Verified	2023-11-20	Naegi Makoto	1D2CEAB4420226D3	2	1457674	5	3

History

Date	User	Type	Result
2023-11-20	Chun sung soo	CERT	PRP Certification Proof certified good
2023-11-20	Naegi Makoto	C-PRP	M1877471/2361570893288808776950667993/41993417944338771442273592089 : 1D2CEAB4420226D3 PRP proof power = 7 PRP: Verified Proof certified good
2023-11-20	TJAOI	F-ECM	Factor: 2361570893288808776950667993 / (ECM curve 8, B1=250000, B2=40000000, Sigma=5368949592068772)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1877471/41993417944338771442273592089 : 8FD721786E9B1095 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1877471/41993417944338771442273592089 : 8FD721786E9B1095 PRP: Verified (Factored) PRP without proof (not generated)
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-20	bam	F-ECM	Factor: 41993417944338771442273592089 / (ECM curve 3, B1=50000, B2=5000000)
2015-10-07	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-12	ramgeis	NF	no factor from 2^65 to 2^66
2015-06-28	MadPoo	C-LL	2E274CFE8C771420
2015-05-09	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-09	snme2pm1	NF	no factor from 2^63 to 2^64
2012-01-13	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-11	Architects Cubed	NF	no factor from 2^60 to 2^61