is 2 2700559 - 1
has 812950 decimal digits
takes 0.209 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6A2ED31EA1B0649Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27088.481968.5714%30000080000000.08063.2388%88.562569.5893%1.0179%
PrimeNet2590.028462.7119%120002200000.00262.8431%0.031063.7720%1.0602%
GPU722630.591065.0794%140002200000.00281.6613%0.593865.6595%0.5802%
Difference+7+87.8909+3.4921%+286000+7780000+0.0778+1.5774%+87.9687+3.9298%+0.4377%

Known prime factors (1 factor, 66.3 bits, 0.00245576% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2700559920611636114886022412066.31917044834719680
26 × 5 × 37 × 157 × 9169411
2014-05-0115791694117.86440.05600.1045

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.156%
2003-11-28T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.572%
2010-12-16T22:40:00Jocelyn LaroucheManual testing2000020000---0.002--0.188%
2010-12-26T02:29:00Jocelyn LaroucheManual testing3000030000---0.003--0.266%
2011-01-16T01:59:00Jocelyn LaroucheManual testing5000050000---0.006--0.393%
2011-01-29T13:38:00Matteo2D50000800000---0.010--1.274%
2011-03-14T15:50:00James HeinrichWHS3000008000000---0.081--3.239%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-01-31T15:00:00Sturle Sundedittersdorf.ifi260261--0.057--
2012-05-01T23:03:00Grant McCrackenthumper261262--0.114--
2013-01-17T00:05:00AxelssonManual testing262263--0.364--
2013-01-17T00:05:00AxelssonManual testing263264--0.727--
2013-01-17T00:05:00AxelssonManual testing264265--1.384--
2014-03-08T13:58:00Never Odd Or EvenManual testing265266--2.767--
2014-03-08T13:58:00Never Odd Or EvenManual testing266267--5.534--
2014-05-01T13:07:00Never Odd Or EvenManual testing26626766.319202.3960.4244.869
2014-03-08T13:58:00Never Odd Or EvenManual testing267268--11.07--
2014-03-08T13:58:00Never Odd Or EvenManual testing268269--22.14--
2014-03-08T13:58:00Never Odd Or EvenManual testing269270--44.27--


ECM factoring results:
Total ECM effort:0.932 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000090.932


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00ANONYMOUSv4_computers6A2ED31EA1B0649B0.209
2011-01-27T17:29:00Matteo2D6A2ED31EA1B0649B0.209


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-19T11:57:33Oliver KruseGTX-0
92061163611488602241
266EDA7281E4E1__no
2017-12-04T12:21:12kkmrkkblmbrbkc4.xlarge
92061163611488602241
266EDA7281E4E1__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 8000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 50000, B2 = 800000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
270
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268
267
266
265
264
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261
250
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270
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2100
Last modified: 2017-12-04T12:21:12+00:00