is 2 25252541 - 1
has 7601773 decimal digits
takes 21.640 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAAE61EFAD5938BF0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27237.870865.2778%3750003750000.46601.4457%38.336865.7798%0.5020%
PrimeNet2660.584862.1212%11000040000000.40004.9842%0.984964.0092%1.8880%
GPU722709.462464.2857%18000055000000.58383.7377%10.046365.6206%1.3349%
Difference+2+28.4083+0.9921%+195000-5125000-0.1179-2.2919%+28.2905+0.1592%+0.1592%

Known prime factors:
No known factors for M25252541

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-07-26T00:00:00ANONYMOUSv4_computers375000375000---0.466--1.446%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-12T00:00:00Net_Forcev4_computers21256--0.000--
2001-08-24T00:00:00Mattv4_computers21258--0.002--
2004-01-07T00:00:00markrv4_computers21262--0.024--
2004-04-29T00:00:00ANONYMOUSv4_computers21267--1.177--
2016-01-04T21:26:21VictordeHollanderManual testing267268--1.184--
2017-06-17T22:10:10ramgeisManual testing268269--2.367--
2017-06-17T22:10:10ramgeisManual testing269270--4.735--
2021-01-08T16:04:38-Anonymous-Manual testing270271--9.469--
2021-01-08T16:04:38-Anonymous-Manual testing271272--18.94--


ECM factoring results:
No ECM results for M25252541


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-09-16T00:00:00ANONYMOUSv4_computers43F27FB76115E1__21.64
2005-02-02T00:00:00McTheKnifev4_computersAAE61EFAD5938BF021.64
2011-02-15T14:54:00J. Arizujarkr-maschineAAE61EFAD5938BF021.64


PRP results:
No PRP results for M25252541


P-1 factor-bounds graph:
B1 = 375000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
272
271
270
269
268
267
262
258
256
250
260
270
280
290
2100
Last modified: 2021-01-08T16:04:38+00:00