is 2 61761811 - 1
has 18592158 decimal digits
takes 145.083 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
Actual27330.971364.3836%5800005800001.97561.7886%32.946965.0206%0.6370%
PrimeNet2703.868962.8571%260000120000003.06435.1401%6.933264.7663%1.9092%
GPU7227461.945564.8649%400000130000003.70073.7200%65.646266.1719%1.3070%
Difference-1-30.9742-0.4813%+180000-12420000-1.7252-1.9313%-32.6993-1.1513%-1.1513%

Known prime factors (1 factor, 79.1 bits, 0.00012813% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
617618116641462894302689167634732479.1365376674345173176
23 × 3 × 269 × 331 × 8363 × 300857
2013-05-0283633008572,100.80.08280.1043

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-05-02T08:14:00Jwb52zClay5800005800002479.1361.976290.23.9511.789%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-17T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-11-28T00:00:00ANONYMOUSv4_computers21260--0.002--
2004-04-09T00:00:00ANONYMOUSv4_computers21262--0.010--
2022-03-29T23:12:09LordJuliusManual testing262263--0.016--
2009-04-10T00:33:00BadidasMacPro263264--0.032--
2009-09-22T13:13:00pidev2264265--0.060--
2009-09-25T10:07:00pidev2265266--0.121--
2009-09-29T12:55:00ANONYMOUSCarnegie7266267--0.242--
2009-10-02T19:41:00ANONYMOUSCarnegie7267268--0.484--
2009-10-07T13:44:00ANONYMOUSCarnegie7268269--0.968--
2011-12-01T20:32:00ANONYMOUS269270--1.936--
2013-02-04T22:49:00XyzzyManual testing270271--3.872--
2013-02-11T18:12:00Luigi MorelliManual testing271272--7.744--
2013-02-24T17:16:00TheJudgerManual testing272273--15.49--


ECM factoring results:
No ECM results for M61761811


Lucas-Lehmer results:
No L-L results for M61761811


PRP results:
No PRP results for M61761811


P-1 factor-bounds graph:
B1 = 580000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
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260
259
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260
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2100
Last modified: 2022-03-29T23:12:09+00:00