is 2 27369289 - 1
has 8238977 decimal digits
takes 25.336 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE5286B778D51F892double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27117.467764.7887%25500012750000.41692.5032%17.884665.6701%0.8814%
PrimeNet2660.539662.1212%12000045000000.48145.2182%1.021064.0978%1.9766%
GPU722708.730664.2857%20000060000000.69263.9082%9.423265.6815%1.3958%
Difference+1+8.7371+0.5030%+55000-4725000-0.2757-1.4050%+8.4613-0.0114%-0.0114%

Known prime factors (1 factor, 67.6 bits, 0.00024704% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
273692892256663822409173366792167.6134122620471451
3 × 1374206823817
2011-10-04313742068238171.5090100,496187,698

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-04-26T00:00:00ANONYMOUSv4_computers2550001275000---0.417--2.503%
2011-10-04T08:13:00Carsten KossendeyManual testing25500012750002167.6130.41750.670.8342.503%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24T00:00:00Net_Forcev4_computers21256--0.000--
2004-04-29T00:00:00ANONYMOUSv4_computers21261--0.011--
2004-08-20T00:00:00ANONYMOUSv4_computers21262--0.022--
2004-11-03T00:00:00Edov4_computers21267--1.086--
2011-10-04T08:12:00Carsten KossendeyManual testing267271--16.38--


ECM factoring results:
No ECM results for M27369289


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-05-12T00:00:00ANONYMOUSv4_computersE5286B778D51F89225.34


PRP results:
No PRP results for M27369289


P-1 factor-bounds graph:
B1 = 255000, B2 = 1275000 (P-1 stage 2)
B1 = 255000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2011-10-04T08:13:26+00:00