is 2 1775549 - 1
has 534494 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L817162CBE2DFAB10double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.735168.6567%500000150000000.10155.0502%16.836570.2396%1.5829%
PrimeNet2570.010863.1579%80001400000.00122.8102%0.012064.1932%1.0353%
GPU722610.173065.5738%80001200000.00111.4553%0.174166.0748%0.5010%
Difference+6+16.5621+3.0829%+492000+14880000+0.1004+3.5948%+16.6624+4.1648%+4.1648%

Known prime factors (1 factor, 65.2 bits, 0.00367220% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1775549424292000166239689272065.20211948191803387
32 × 7 × 71 × 2671180819
2013-06-097126711808194.242911.44821.382

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-09T06:18:00Carsten Kossendeyleela950001615000---0.014--2.434%
2016-03-16T12:31:51alpertronManual testing5000001500000012---0.101--5.050%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-19T13:16:00Architects Cubedm1_tt260261--0.087--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.899--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.141 GHz-days
Estimated T-Level:24.446
DigitsB1CurvesCompleteFacMiss
2011000249 / 1002.4908.188%
2550000249 / 2800.88941.030%

New Calculation Method

Total ECM effort:17.141 GHz-days
Estimated T-Level:24.446
DigitsB1CompleteFacMiss
20110008.0320.032%
25500000.72648.387%
302500000.04595.628%
3510000000.00299.796%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024917.14


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers817162CBE2DFAB100.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T12:44:13Oliver KruseGTX-0
42429200016623968927
F4216C0D7C8C9C__no
2017-11-04T16:03:47kkmrkkblmbrbkold
42429200016623968927
F4216C0D7C8C9C__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
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104
105
106
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1010
TF factor-bounds graph:
267
263
261
258
250
260
270
280
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2100
Last modified: 2020-09-18T09:18:53+00:00