is 2 27303847 - 1
has 8219277 decimal digits
takes 25.275 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3F807ED625DA3184double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual274140.121966.2162%120000012000000010.29855.7315%150.420468.1525%
Target2708.751564.2857%20000060000000.69263.9069%9.444165.6810%
Difference+4+131.3703+1.9305%+1000000+114000000+9.6059+1.8246%+140.9763+2.4715%

Known prime factors (1 factor, 129.8 bits, 0.00047542% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
27303847119133120495351508366520569355318628099140129.80821816178594787670097646051370585
32 × 5 × 5087 × 9133 × 16699 × 45119 × 121609 × 113887307		2021-10-101216091138873076.587e+98.482915.555

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-02-02ANONYMOUSv4_computers420000420000---0.564--1.209%
2021-10-02Oliver KruseManual testing12000006120000024---5.999--5.145%
2021-10-09Oliver KruseManual testing12000001200000002440129.80810.3050.5520.605.732%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-11-05Jocelyn Larouchev4_computers21254--8.78941e-5--
2001-08-18Net_Forcev4_computers21256--0.000--
2004-04-09ANONYMOUSv4_computers21261--0.011--
2004-07-13ANONYMOUSv4_computers21262--0.023--
2004-10-18Helgenv4_computers21267--1.088--
2011-10-23Carsten KossendeyManual testing267268--1.095--
2018-04-09VictordeHollanderManual testing268269--2.190--
2018-09-24ramgeisManual testing269270--4.379--
2021-02-28mikrManual testing270271--8.758--
2021-08-23TheJudgerManual testing271272--17.52--
2021-08-23TheJudgerManual testing272273--35.03--
2021-09-12TheJudgerManual testing273274--70.06--


ECM factoring results:
No ECM results for M27303847


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2006-11-09ANONYMOUSv4_computers3F807ED625DA318425.28
2006-11-28ANONYMOUSv4_computers3F807ED625DA318425.28
2007-03-20ANONYMOUSv4_computers3F807ED625DA318425.28
2011-11-16Cong_yao_Zhoutiankuo3F807ED625DA318425.28


PRP results:
dateuseridcompidcofactorsres64PRP
2023-02-01DobriManual testing
1191331204953515083665205693553186280991
0D16B61B1062CAA1no


P-1 factor-bounds graph:
B1 = 1200000, B2 = 120000000 (P-1 stage 2)
B1 = 1200000, B2 = 61200000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 420000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2023-02-01T14:34:13+00:00