is 2 47514347 - 1
has 14303244 decimal digits
takes 82.490 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L19DCF5777D6AF5A9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27480.520264.8649 %100000010000002.51741.9275 %83.037665.5421 %
Target27220.127363.8889 %340000550000008.35274.1598 %28.479965.3911 %
Difference+2+60.3930+0.9760 %+660000-54000000-5.8353-2.2324 %+54.5576+0.1510 %

Known prime factors (1 factor, 76.7 bits, 0.00016147% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
475143471245735796900606876767592476.7211310904890369857
457 × 1031 × 3391 × 820481
2019-05-213391820481387.420.12060.2102

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-21ANONYMOUSv4_computers740000740000--1.8632.133%
2019-05-21Sid & AndyMagic_8_Ball1000000100000012476.7212.4702.399%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2006-12-181997rj7v4_computers212630.021
2008-06-22EPFv4_computers212691.258
2015-08-24Gordon SpenceManual testing2692702.516
2015-10-13Mark RoseManual testing2702715.033
2015-12-04ANONYMOUSManual testing27127210.07
2017-12-25LingUaanManual testing27227320.13
2019-05-20Sid & AndyManual testing27327440.26


ECM factoring results:
No ECM results for M47514347


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-01-04ANONYMOUSv4_computers19DCF5777D6AF5A982.49
2019-05-05monstpoincare19DCF5777D6AF5A982.49


PRP results:
No PRP results for M47514347


CERT results:
No CERT results for M47514347


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
B1 = 740000 (P-1 stage 1)
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103
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105
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102
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104
105
106
TF factor-bounds graph:
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273
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271
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269
263
this exponent TF target: 72
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00