15 195 757 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
25043910425665927235521	23	74.4	2023-11-04 13:29:35
826749326482941061562347760839	30	99.4	2023-04-17 17:29:32

ECM

Digits	B1	Curves
25	50000	14 / 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)	2002-08-31	Ars Technica Team Prime Rib	623D75479C6D081E	12970927
Verified (Factored)	2003-12-31	Kenneth Maniscalco	623D75479C6D081E	9144797

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2023-04-18	Naegi Makoto	A278A392BA26F906	1	11015844	5	3
Verified	2023-11-06	Naegi Makoto	A278A392BA26F906	2	8810585	5	3

P-1 factors

Date	Factor	B1	B2
2023-11-04	25043910425665927235521	480000	457195200

History

Date	User	Type	Result
2023-11-06	estrand	CERT	PRP Certification Proof certified good
2023-11-06	Naegi Makoto	C-PRP	M15195757/25043910425665927235521/826749326482941061562347760839 : A278A392BA26F906 PRP proof power = 8 PRP: Verified Proof certified good
2023-11-04	nordi	F-PM1	Factor: 25043910425665927235521 / (P-1, B1=480000, B2=457195200)
2023-10-22	nordi	NF-PM1	B1=480000
2023-04-18	Dry Creek Photo	CERT	PRP Certification Proof certified good
2023-04-18	Naegi Makoto	C-PRP	M15195757/826749326482941061562347760839 : A278A392BA26F906 PRP proof power = 8 PRP: Verified (Factored) Proof certified good
2023-04-17	ATH	F-PP1	Start=2/7, B1=1000000, B2=29000000, Factor: 826749326482941061562347760839
2021-10-15	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-06	SRBase	NF	no factor from 2^70 to 2^71
2021-07-06	lycorn	NF	no factor from 2^69 to 2^70
2017-10-11	ramgeis	NF	no factor from 2^68 to 2^69
2016-11-02	mikr	NF	no factor from 2^67 to 2^68
2014-05-14	Nesowa	NF	no factor from 2^66 to 2^67
2014-05-14	Nesowa	NF	no factor from 2^65 to 2^66