5 987 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
60583758167	11	35.8	old
118333443340769	15	46.7	old
326988432017955031	18	58.2	old
152405361481278529228275766282188894934124617	45	146.8	2020-11-14 13:52:24

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	4136 / 16550

Estimated T-Level: 46.2 ⓘ

TF below 2^149 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	D0CD8F17D3E2672D	3	0	1	3
Factored	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	D0CD8F17D3E2672D	3	0	1	3
Factored	No proof (small exponent)	2017-12-07	ATH	D0CD8F17D3E2672D	3	1364	1	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	A160B20E82C48147	3	3433	5	3
Verified	No proof (small exponent)	2020-11-14	mrh	A160B20E82C48147	4	5290	5	3

History

Date	User	Type	Result
2025-05-24	masser	NF-PP1	Start=139/19, B1=1500000000, B2=1498500000000
2023-07-26	-anonymous-	NF-PM1	B1=41000000000, B2=167114967216697500
2020-11-14	mrh	C-PRP	M5987/60583758167/118333443340769/326988432017955031/152405361481278529228275766282188894934124617 : A160B20E82C48147
2020-11-14	Ryan Propper	F-ECM	Factor: 152405361481278529228275766282188894934124617
2020-04-17	Oliver Kruse	C-PRP	M5987/60583758167/118333443340769/326988432017955031 : A160B20E82C48147
2017-12-07	ATH	C-PRP	M5987/60583758167/118333443340769/326988432017955031 : D0CD8F17D3E2672D
2017-10-02	kkmrkkblmbrbk	C-PRP	M5987/60583758167/118333443340769/326988432017955031 : D0CD8F17D3E2672D
2017-09-21	Oliver Kruse	C-PRP	M5987/known_factors : D0CD8F17D3E2672D