is 2 83536261 - 1
has 25146921 decimal digits
takes 260.674 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
Actual276183.201864.4737%665000121362505.83683.3461%189.038665.6624%1.1887%
PrimeNet2715.723061.9718%360000170000005.73105.3699%11.454064.0139%2.0421%
GPU7227591.599864.0000%550000190000007.03693.9357%98.636765.4169%1.4169%
Difference+1+91.6020+0.4737%+115000-6863750-1.2000-0.5896%+90.4019+0.2456%+0.2456%

Known prime factors (1 factor, 92.6 bits, 0.00011085% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8353626174907463360970805885660031912892.59744835298147334368895
5 × 13 × 31 × 491 × 2861 × 9011 × 1757813
2017-10-099011175781320,985,3040.47190.8093

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-10-09T05:06:54Jwb52zClay665000121362502892.5975.837521.311.673.346%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-21T02:40:00Architects Cubedm1_71264265--0.045--
2012-09-12T16:09:00Carsten KossendeyManual testing265266--0.089--
2013-02-14T10:50:00Juergen KampmeierManual testing266267--0.179--
2013-02-15T15:21:00Juergen KampmeierManual testing267268--0.358--
2013-02-18T22:43:00tom9358laptoptom268269--0.716--
2013-02-20T02:18:00HBendtzHAL9007269270--1.431--
2013-06-18T18:36:00Cow_tippingManual testing270271--2.863--
2016-12-26T03:55:07Judge HaleManual testing271272--5.725--
2016-12-26T03:55:07Judge HaleManual testing272273--11.45--
2017-01-17T14:16:16Brian BeuningManual testing273274--22.90--
2017-01-17T14:16:16Brian BeuningManual testing274275--45.80--
2017-03-11T00:44:15ANONYMOUSManual testing275276--91.60--


ECM factoring results:
No ECM results for M83536261


Lucas-Lehmer results:
No L-L results for M83536261


PRP results:
No PRP results for M83536261


P-1 factor-bounds graph:
B1 = 665000, B2 = 12136250 (P-1 stage 2)
B1 = 665000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2017-10-09T05:06:54+00:00