is 281216857-1
has 24,448,711 decimal digits
takes 253.436 GHz-days to do one L-L test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27594.215864.0000%685,00013,700,0006.30793.7835%100.523667.7835%5.8117%
PrimeNet2715.886461.9718%340,00016,000,0005.39895.2564%11.285367.2283%5.2564%
GPU7227594.215864.0000%550,00018,000,0006.79033.8820%101.006167.8820%3.8820%
Difference---+135,000-4,300,000-0.4825-0.0984%-0.4825-0.0984%-0.0984%

Known prime factors (1 factor, 128.6 bits, 0.00015830% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
8121685750462077824051985058269779439544645535139128.5683106625871033890480289687856275
3 × 52 × 17 × 3517 × 4349 × 26713 × 32609 × 44887 × 4074143
44,8874,074,1432017-05-211.583e+91.19641.8758

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-05-21T12:38:23Bruceeleven685,00013,700,00039128.5686.308506.912.623.784%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-12T15:20:00For Researchm1_44264265--0.046--
2012-12-01T19:02:00c10ck3rManual testing265266--0.092--
2013-01-26T19:28:00Bold_SeekerManual testing266267--0.184--
2013-03-13T12:15:00ANONYMOUS267268--0.368--
2013-03-14T07:45:00jondi_hanlucManual testing268269--0.736--
2013-03-14T07:45:00jondi_hanlucManual testing269270--1.472--
2013-03-14T07:45:00jondi_hanlucManual testing270271--2.944--
2013-03-14T07:45:00jondi_hanlucManual testing271272--5.889--
2013-03-14T07:45:00jondi_hanlucManual testing272273--11.78--
2016-09-02T15:44:14AirSquirrelsManual testing273274--23.55--
2016-09-02T17:45:13AirSquirrelsManual testing274275--47.11--


ECM factoring results:
Exponent "81216857" not found


Lucas-Lehmer results:
Exponent "81216857" not found


PRP results:
Exponent "81216857" not found


P-1 factor-bounds graph:
B1 = 685,000, B2 = 13,700,000 (stage 2)
B1 = 685,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2017-05-21T12:38:23+00:00