is 2 47771077 - 1
has 14380528 decimal digits
takes 82.936 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L272D81CF1D64C21Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27340.041964.3836 %1000000200000005.12334.8183 %45.165266.0997 %
Target27220.019163.8889 %340000550000008.35274.1627 %28.371865.3921 %
Difference+1+20.0228+0.4947 %+660000-35000000-3.2294+0.6556%+16.7934+0.7076 %

Known prime factors (1 factor, 87.5 bits, 0.00018317% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
477710772191628230855707084227246412787.5022293886142503870160
24 × 3 × 5 × 23 × 43 × 239 × 17317 × 2335037
2019-02-011731723350371,150,3180.36150.5982

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-05-31MalloeAntec745000745000--1.8752.140%
2019-02-01Sid & AndyMagic_8_Ball1000000200000001222787.5025.0275.281%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212630.041
2008-03-29ComputerraRUv4_computers2632692.466
2015-08-04Gordon SpenceManual testing2692702.503
2015-09-11Sid & AndyManual testing2702715.006
2015-11-08Judge HaleManual testing27127210.01
2017-12-27bayanneManual testing27227320.02


ECM factoring results:
No ECM results for M47771077


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-08-06MalloeAntec272D81CF1D64C21F82.94


PRP results:
No PRP results for M47771077


CERT results:
No CERT results for M47771077


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 745000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
273
272
271
270
269
263
this exponent TF target: 72
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00