203 141 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
23824158458504843809215522529079	32	104.2	2017-03-13 08:38:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	628 / 640

Estimated T-Level: 29.9 ⓘ

TF below 2^94 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Amdahl 6 - 1989	06F8911A	0
Verified (Factored)		Philippe Chessa	43FBA2B446F8911A	0
Verified (Factored)		Brian J. Beesley	43FBA2B446F8911A	0
Verified (Factored)		Eivind Triel	43FBA2B446F8911A	130339
Verified (Factored)	2016-06-01	MadPoo	43FBA2B446F8911A	121108

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	37B104C306E6E92A	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	37B104C306E6E92A	1	199255	1	3
Verified	2020-04-17	Oliver Kruse	475BE2BBE4D5AB5C	1	46654	5	3
Verified	2023-08-03	USAFSS	475BE2BBE4D5AB5C	1	187089	5	3

P-1 factors

Date	Factor	B1	B2
2017-03-13	23824158458504843809215522529079	200000000	24805216315822

History

Date	User	Type	Result
2023-08-03	curtisc	CERT	PRP Certification Proof certified good
2023-08-03	USAFSS	C-PRP	M203141/23824158458504843809215522529079 : 475BE2BBE4D5AB5C PRP proof power = 5 PRP: Verified Proof certified good
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-17	Oliver Kruse	C-PRP	M203141/23824158458504843809215522529079 : 475BE2BBE4D5AB5C PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M203141/23824158458504843809215522529079 : 37B104C306E6E92A PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M203141/23824158458504843809215522529079 : 37B104C306E6E92A PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M203141/23824158458504843809215522529079 : 37B104C306E6E92A PRP without proof (not generated)
2017-03-13	kkmrkkblmbrbk	F-PM1	Factor: 23824158458504843809215522529079 / (P-1, B1=200000000, B2=24805216315822)
2016-06-01	MadPoo	C-LL	43FBA2B446F8911A
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-12-29	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-29	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-06-03	snme2pm1	NF	no factor from 2^61 to 2^62
2014-08-19	mikr	NF-PM1	B1=100835998, B2=5445143892, E=12
2013-08-02	lycorn	NF	no factor from 2^60 to 2^61
2009-02-16	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-27	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59