2 017 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 5 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
9338711	7	23.2	old
33142883320407031	17	54.9	old
136151781504478344961	21	66.9	old
38098901398490258064593672186196369485939882623135103	53	174.7	2019-10-09 21:00:33
15829723099459881421002596380996841406976563824120125965497	59	193.3	2019-10-15 06:08:55

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	64448 / 105362

Estimated T-Level: 58.1 ⓘ

TF below 2^188 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-21	Oliver Kruse	F5A1215F8A1F7DFB	3	0	1	3
Verified (Factored)	2017-10-02	kkmrkkblmbrbk	F5A1215F8A1F7DFB	3	0	1	3
Verified (Factored)	2017-12-07	ATH	F5A1215F8A1F7DFB	3	1979	1	3
Verified (Factored)	2019-10-10	Niels_Mache_Nextcloud	A985B9D39E60C2D5	4	1632	5	3
Verified (Factored)	2019-10-11	GAN	A985B9D39E60C2D5	4	1217	5	3
Verified	2019-10-15	mnd9	A985B9D39E60C2D5	5	162	5	3
Verified	2020-04-17	Oliver Kruse	A985B9D39E60C2D5	5	1000	5	3

P-1 factors

Date	Factor	B1	B2
2021-08-09	309511809036001664877041	2000000000	2000000000

History

Date	User	Type	Result
2025-03-29	masser	NF-PP1	Start=96/71, B1=12500000000, B2=12487500000000
2024-03-28	masser	NF-PM1	B1=100000000000, B2=160017991988694840
2021-08-09	JackBlock	F-PM1	Factor: 309511809036001664877041 / (P-1, B1=2000000000)
2021-03-28	ViliamF	NF-PM1	B1=1000000000, B2=191000000000
2020-04-17	Oliver Kruse	C-PRP	M2017/9338711/33142883320407031/136151781504478344961/38098901398490258064593672186196369485939882623135103/15829723099459881421002596380996841406976563824120125965497 : A985B9D39E60C2D5 PRP: Verified PRP without proof (small exponent)
2019-10-15	mnd9	C-PRP	M2017/9338711/33142883320407031/136151781504478344961/38098901398490258064593672186196369485939882623135103/15829723099459881421002596380996841406976563824120125965497 : A985B9D39E60C2D5 PRP: Verified PRP without proof (small exponent)
2019-10-15	Ryan Propper	F-ECM	Factor: 15829723099459881421002596380996841406976563824120125965497 / (ECM curve 1, B1=260000000)
2019-10-11	GAN	C-PRP	M2017/9338711/33142883320407031/136151781504478344961/38098901398490258064593672186196369485939882623135103 : A985B9D39E60C2D5 PRP: Verified PRP without proof (small exponent)
2019-10-10	Niels_Mache_Nextcloud	C-PRP	M2017/9338711/33142883320407031/136151781504478344961/38098901398490258064593672186196369485939882623135103 : A985B9D39E60C2D5 PRP: Verified PRP without proof (small exponent)
2019-10-09	Ryan Propper	F-ECM	Factor: 38098901398490258064593672186196369485939882623135103 / (ECM curve 1, B1=260000000)
2017-12-07	ATH	C-PRP	M2017/9338711/33142883320407031/136151781504478344961 : F5A1215F8A1F7DFB PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M2017/9338711/33142883320407031/136151781504478344961 : F5A1215F8A1F7DFB PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2017/known_factors : F5A1215F8A1F7DFB PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=50000000000, E=12