5 237 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
4022017	7	21.9	old
286070148515945115042824929601	30	97.9	old

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	10646 / 16550

Estimated T-Level: 48.2 ⓘ

TF below 2^155 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	17B8F788BA801562	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	17B8F788BA801562	2	2298	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	EF165DE76371C427	2	3418	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	EF165DE76371C427	2	2341	5	3

History

Date	User	Type	Result
2025-04-27	masser	NF-PP1	Start=95/47, B1=2100000000, B2=2097900000000
2024-02-03	Wentao Huang	C-PRP	M5237/4022017/286070148515945115042824929601 : EF165DE76371C427
2023-11-06	mikr	NF-PM1	B1=500000000000, B2=1311295166917335600
2023-06-27	-anonymous-	NF-PM1	B1=60000000000, B2=253175458787951700
2021-12-16	Oliver Kruse	NF-PM1	B1=1000000000, B2=1002849399191640
2021-12-15	ANONYMOUS	NF-PM1	B1=101101101, B2=242033299467960
2020-04-17	Oliver Kruse	C-PRP	M5237/4022017/286070148515945115042824929601 : EF165DE76371C427
2017-10-12	kkmrkkblmbrbk	C-PRP	M5237/4022017/286070148515945115042824929601 : 17B8F788BA801562
2017-09-21	Oliver Kruse	C-PRP	M5237/4022017/286070148515945115042824929601 : 17B8F788BA801562
2017-09-21	Oliver Kruse	C-PRP	M5237/4022017/286070148515945115042824929601 : 17B8F788BA801562