1 903 289 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
11629095791	11	33.4	old
435209869319	12	38.7	2008-07-15 07:48:01
13913739407855809683193	23	73.6	2023-12-04 11:51:39
28673912581062008978521	23	74.6	2020-11-18 10:45:13

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	F9A7FBAAE9E549B2	2	0	1	3
Verified (Factored)	2017-11-09	kkmrkkblmbrbk	F9A7FBAAE9E549B2	2	847776	1	3
Verified (Factored)	2020-11-19	rbanov	AB7A03360CBAA335	3	365637	5	3
Verified	2023-12-04	Naegi Makoto	AB7A03360CBAA335	4	870268	5	3

History

Date	User	Type	Result
2023-12-04	curtisc	CERT	PRP Certification Proof certified good
2023-12-04	Naegi Makoto	C-PRP	M1903289/11629095791/435209869319/13913739407855809683193/28673912581062008978521 : AB7A03360CBAA335 PRP proof power = 7 PRP: Verified Proof certified good
2023-12-04	TJAOI	F-ECM	Factor: 13913739407855809683193 / (ECM curve 27, B1=250000, B2=40000000, Sigma=3199086314691530)
2021-06-30	Dylan Delgado	NF-PM1	B1=2000000, B2=262000000
2021-04-07	Dylan Delgado	NF-PM1	B1=1000000, B2=71000000
2020-11-19	curtisc	CERT	PRP Certification Proof certified good
2020-11-19	rbanov	C-PRP	M1903289/11629095791/435209869319/28673912581062008978521 : AB7A03360CBAA335 PRP proof power = 7 PRP: Verified (Factored) Proof certified good
2020-11-18	_p95holder_	F-ECM	Factor: 28673912581062008978521 / (ECM curve 5, B1=50000, B2=5000000)
2017-11-09	kkmrkkblmbrbk	C-PRP	M1903289/11629095791/435209869319 : F9A7FBAAE9E549B2 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1903289/11629095791/435209869319 : F9A7FBAAE9E549B2 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 435209869319