is 2 1757267 - 1
has 528991 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L532D415119A54897double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.909268.6567%500000150000000.10155.0439%17.010670.2376%1.5809%
PrimeNet2570.010963.1579%80001400000.00122.8047%0.012164.1912%1.0333%
GPU722610.174865.5738%80001100000.00111.4139%0.175966.0605%0.4868%
Difference+6+16.7344+3.0829%+492000+14890000+0.1004+3.6300%+16.8348+4.1771%+4.1771%

Known prime factors (3 factors, 201.5 bits, 0.01146903% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1757267176911152557867230312063.9405033701553545
5 × 7 × 17 × 25759 × 328429
2010-08-30257593284291.81390.00330.0041
17572671969171844626178962312167.41656029386673345
5 × 472477 × 23717297
2020-06-164724772371729717.2220.13680.1898
175726713426614356393140556332270.186382031141437048
23 × 257 × 185812811983
2020-08-14257185812811983241.07796.351,487.4

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1757267348368460617318772546466796142269579616140131.356
17572672375317820739517224159785755802349638362341134.125
175726726439310959263017223282337240484695501922342137.602
175726746774089746390706241156081596329928431068577890907
08781824913
61201.541
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:58alpertronManual testing5000001500000012-
skipped known factor: 17691115255786723031
--0.101--5.044%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2022-03-08T23:06:25LordJuliusManual testing258260--0.066--
2022-03-09T03:01:43LordJuliusManual testing21260--0.087--
2010-04-23T06:20:00Architects Cubedi4l_1260261--0.087--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.978 GHz-days
Estimated T-Level:24.929
DigitsB1CurvesCompleteFacMiss
2011000276 / 1002.7606.242%
2550000276 / 2800.98637.251%

New Calculation Method

Total ECM effort:18.978 GHz-days
Estimated T-Level:24.929
DigitsB1CompleteFacMiss
20110008.9030.014%
25500000.80544.724%
302500000.05095.166%
3510000000.00299.773%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000022515.47
500005000000271.857
500005000000241.650


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computers532D415119A548970.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T08:15:08Oliver KruseGTX-0
17691115255786723031
3A146C009635CB__no
2017-11-04T00:13:17kkmrkkblmbrbkc4.xlarge
17691115255786723031
3A146C009635CB__no
2020-06-17T08:00:32LaurV3tits
17691115255786723031
196917184462617896231
E521E0F1863DCF44no
2020-06-17T08:19:55ATHec2-PRPCFDC
17691115255786723031
196917184462617896231
E521E0F1863DCF44no
2020-08-15T09:20:32CrypticCluecruncher
17691115255786723031
196917184462617896231
1342661435639314055633
E521E0F1863DCF44no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
261
260
258
250
260
270
280
290
2100
Last modified: 2022-03-09T03:01:43+00:00