is 2 58185541 - 1
has 17515594 decimal digits
takes 123.321 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual275131.508865.3333%545000110362503.43153.3729%134.940366.5026%
Target27332.874964.3836%40000010400000018.57574.0790%51.450665.8363%
Difference+2+98.6339+0.9498%+145000-92963750-15.1442-0.7061%+83.4897+0.6663%

Known prime factors (1 factor, 66.2 bits, 0.00011374% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58185541836019518274250980172066.180718408305488
24 × 44900519093		2019-06-1116449005190930.31107,518.014,041

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-12ANONYMOUS54500011036250---3.432--3.373%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-08ANONYMOUSv4_computers21253--2.06224e-5--
1999-12-23ANONYMOUSv4_computers21253--2.06224e-5--
2000-02-09ANONYMOUSv4_computers21254--4.12447e-5--
2000-06-28ANONYMOUSv4_computers21256--0.000--
2000-06-29ANONYMOUSv4_computers21256--0.000--
2001-07-17ANONYMOUSv4_computers21257--0.000--
2002-06-15ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-11-28ANONYMOUSv4_computers21261--0.005--
2016-02-23Mark RoseManual testing261263--0.022--
2008-10-28arnaudSRV-220263264--0.034--
2008-10-28KYOJI_KAMEIwlaptop264265--0.064--
2008-10-28KYOJI_KAMEIwlaptop265266--0.128--
2008-10-28KYOJI_KAMEIwlaptop266267--0.257--
2019-06-11TJAOIManual testing266267*66.180200.057282.30.131
2009-08-03SAHS Tech Deptcad7267268--0.514--
2011-05-02ANONYMOUS268269--1.027--
2011-06-23shaugeManual testing269270--2.055--
2011-06-23shaugeManual testing270271--4.110--
2012-06-01Craig MeyersManual testing271272--8.219--
2012-09-17bcp19Manual testing272273--16.44--
2014-10-23Jerry HallettManual testing273274--32.88--
2019-01-11Sid & AndyManual testing274275--65.76--


ECM factoring results:
No ECM results for M58185541


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-11-18Judge HalePrissy1BAE08AC2F070B__123.3


PRP results:
No PRP results for M58185541


P-1 factor-bounds graph:
B1 = 545000, B2 = 11036250 (P-1 stage 2)
B1 = 545000 (P-1 stage 1)
100
101
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106
100
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105
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1010
1011
TF factor-bounds graph:
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274
273
272
271
270
269
268
267
266
265
264
263
261
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67.8
250
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280
Last modified: 2023-06-05T21:50:05+00:00