is 2 75172561 - 1
has 22629196 decimal digits
takes 207.830 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275101.791264.0000%6200006200002.48551.5032%104.276764.5412%0.5412%
PrimeNet2703.178761.4286%320000140000004.27075.5590%7.449463.5727%2.1442%
GPU7227450.894463.5135%500000180000005.82664.1842%56.721065.0402%1.5267%
Difference+1+50.8968+0.4865%+120000-17380000-3.3411-2.6809%+47.5557-0.4990%-0.4990%

Known prime factors (1 factor, 76.6 bits, 0.00010184% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
751725611111811522574623055490092476.557739506215954664
23 × 33 × 17 × 31 × 41 × 9749 × 16253
2016-01-06974916253339.490.04050.0795

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-01-06T08:43:52guruw106200006200002476.5572.485415.74.9711.503%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-21T00:00:00Marzbugv4_computers21263--0.021--
2004-12-13T00:00:00Marzbugv4_computers21264--0.047--
2005-01-10T00:00:00Marzbugv4_computers21264--0.047--
2005-02-12T00:00:00Marzbugv4_computers21264--0.047--
2010-07-30T13:16:00ANONYMOUSarcanez264265--0.050--
2010-08-05T08:03:00Danielepippo265266--0.099--
2010-08-06T12:25:00vasanthi920266267--0.199--
2010-08-08T07:38:00arnaudGTI03267268--0.398--
2010-08-13T07:03:00ANONYMOUS268269--0.795--
2012-12-14T16:34:00ANONYMOUSSrvrUID269270--1.591--
2014-03-03T21:33:00sasakimac270271--3.181--
2015-09-01T00:55:00Judge HaleManual testing271272--6.362--
2015-12-20T17:03:01TheJudgerManual testing272273--12.72--
2015-12-20T17:03:01TheJudgerManual testing273274--25.45--
2015-12-20T17:03:01TheJudgerManual testing274275--50.90--


ECM factoring results:
No ECM results for M75172561


Lucas-Lehmer results:
No L-L results for M75172561


PRP results:
No PRP results for M75172561


P-1 factor-bounds graph:
B1 = 620000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
265
264
263
250
260
270
280
290
2100
Last modified: 2016-01-06T08:43:52+00:00