is 2 85393921 - 1
has 25706132 decimal digits
takes 275.040 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
Actual276179.216464.4737%6750006750003.15241.4162%182.368864.9768%0.5031%
PrimeNet2715.598561.9718%360000170000005.91535.3841%11.513864.0193%2.0475%
GPU7227589.607264.0000%550000190000007.26313.9464%96.870365.4207%1.4207%
Difference+1+89.6093+0.4737%+125000-18325000-4.1107-2.5301%+85.4985-0.4439%-0.4439%

Known prime factors (1 factor, 93.5 bits, 0.00010950% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
85393921140723217788837069150131770172993.50782396507936927424348
22 × 191 × 601 × 1013 × 303007 × 584627
2018-01-1430300758462739,700,0101.48682.8800

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-01-15T03:58:25Jwb52zClay6750006750002993.5073.152550.16.3051.416%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-11-26T02:50:00Architects Cubedm1_54264265--0.044--
2013-03-06T00:28:00E.Lechner265266--0.088--
2013-03-06T18:44:00Florimond C.ichthys1266267--0.175--
2013-03-07T15:05:00Florimond C.ichthys1267268--0.350--
2013-03-14T15:47:00ANONYMOUS268269--0.700--
2013-03-21T10:40:00ANONYMOUS269270--1.400--
2013-06-29T21:47:00willmoreManual testing270271--2.800--
2014-01-22T17:37:00natha(net)Manual testing271272--5.601--
2017-03-08T15:29:53Matthias WurtingerManual testing272273--11.20--
2017-04-16T15:41:42ANONYMOUSManual testing273274--22.40--
2017-09-16T21:55:17ANONYMOUSManual testing274275--44.80--
2017-09-24T15:22:05TheJudgerManual testing275276--89.61--


ECM factoring results:
No ECM results for M85393921


Lucas-Lehmer results:
No L-L results for M85393921


PRP results:
No PRP results for M85393921


P-1 factor-bounds graph:
B1 = 675000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
276
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274
273
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2100
Last modified: 2018-01-15T03:58:25+00:00