is 2 14240497 - 1
has 4286817 decimal digits
takes 6.820 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB8F3A19AEE1EE708double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27267.155966.6667%200000096743361037.91338.9016%105.069269.6339%
Target2698.383665.2174%10000024000000.15652.9178%8.540166.2323%
Difference+3+58.7723+1.4493%+1900000+965033610+37.7568+5.9838%+96.5291+3.4016%

Known prime factors (1 factor, 124.8 bits, 0.00087628% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
142404973669604678955443890290464572350522955138124.7871288439820237820312834048057575
3 × 52 × 172 × 227 × 233 × 10891 × 51413 × 508661 × 3945973
2022-03-0650866139459739.791e+90.48320.7188

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-12-22ANONYMOUSv4_computers1600002080000---0.184--2.169%
2022-03-06Architects Cubedburrow200000096743361038124.78737.9113.6475.838.902%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-17Net_Forcev4_computers21256--0.001--
2000-11-25ANONYMOUSv4_computers21265--0.512--
2014-08-01NesowaManual testing265266--0.525--
2015-08-30ThaManual testing266267--1.050--
2018-02-05ramgeisManual testing267268--2.099--
2018-02-05ramgeisManual testing268269--4.198--
2021-08-09SRBaseManual testing269270--8.396--
2021-09-01SRBaseManual testing270271--16.79--
2021-10-15-Anonymous-Manual testing271272--33.58--


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-15ANONYMOUSv4_computers98506C33EFA36F__6.820
2002-11-09ANONYMOUSv4_computersB8F3A19AEE1EE7086.820
2003-04-03ANONYMOUSv4_computersB8F3A19AEE1EE7086.820
2005-04-26ANONYMOUSv4_computersB8F3A19AEE1EE7086.820


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-16Naegi Makoto1700
36696046789554438902904645723505229551
AAC76248329D4851no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 967433610 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 160000, B2 = 2080000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-11-16T10:43:24+00:00