is 2 1277 - 1
has 385 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L5613A480590E78BAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26846,675.706183.8235%5000000000003400000000000240627.030129.4581%47,302.7362113.2816%40.7816%
PrimeNet2400.000172.5000%500100000.00001.7119%0.000174.2119%1.7119%
GPU722440.001875.0000%500100000.00000.6566%0.001875.6566%0.6566%
Difference+24+46,675.7042+8.8235%+4999999999503+399999999990240+627.0301+28.8015%+47,302.7344+37.6250%+37.6250%

Known prime factors:
No known factors for M1,277

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-02-11T00:00:00ANONYMOUSv4_computers100001000000---1.51169e-6--0.172%
2001-02-11T00:00:00ANONYMOUSv4_computers1000000100000000---0.000--2.942%
2001-05-13T00:00:00ANONYMOUSv4_computers30000000004290000000---0.073--9.343%
2002-05-25T00:00:00ANONYMOUSv4_computers10737418244290000000---0.030--9.346%
2002-07-27T00:00:00ANONYMOUSv4_computers21474836484290000000---0.054--9.364%
2002-09-14T00:00:00ANONYMOUSv4_computers32212254724290000000---0.078--9.336%
2002-12-25T00:00:00ANONYMOUSv4_computers42900000002147483647---0.101--9.298%
2003-09-29T00:00:00ANONYMOUSv4_computers1000000100000000---0.000--2.942%
2003-11-28T00:00:00ANONYMOUSv4_computers1000000100000000---0.000--2.942%
2008-10-22T11:10:00Markus TervoorenManual testing450000000004500000000000---6.803--21.098%
2012-08-14T02:14:00Jocelyn LaroucheManual testing500000000002147483647---1.182--13.186%
2012-08-16T22:54:00Jocelyn LaroucheManual testing1500000000002147483647---3.546--14.998%
2012-08-17T16:46:00Jocelyn LaroucheManual testing2000000000002147483647---4.729--15.476%
2012-08-19T13:00:00Jocelyn LaroucheManual testing3100000000002147483647---7.329--16.208%
2012-08-21T10:48:00Jocelyn LaroucheManual testing5000000000002147483647---11.82--17.008%
2012-08-28T10:49:00Jocelyn LaroucheManual testing10000000000002147483647---23.64--18.172%
2012-09-05T10:39:00Jocelyn LaroucheManual testing15000000000002147483647---35.46--18.853%
2012-09-14T13:42:00Jocelyn LaroucheManual testing20000000000002147483647---47.29--19.336%
2012-09-15T01:39:00Jocelyn LaroucheManual testing20000000000003000000000000---48.57--20.174%
2012-09-15T12:42:00Jocelyn LaroucheManual testing20000000000004500000000000---50.51--20.999%
2012-09-18T11:39:00Jocelyn LaroucheManual testing200000000000010000000000000---57.59--22.592%
2012-09-22T05:03:00Jocelyn LaroucheManual testing200000000000020000000000000---70.47--23.939%
2012-09-25T16:14:00Jocelyn LaroucheManual testing200000000000030000000000000---83.35--24.713%
2016-02-29T00:01:41James Hintz08_04_201424047437656601.923795012528E+1412---301.6--28.134%
2016-05-15T10:55:08NoPolarBearsHereManual testing714879390545037401601512---0.740--16.876%
2016-08-06T10:53:22NoPolarBearsHereManual testing87239082440671740934788012---10.60--21.915%
2016-08-28T05:23:54James Hintz04_29_201643569131074233.4855304859384E+1412---546.4--29.210%
2016-10-31T00:06:46Bruno VictalManual testing10000001.0031929860615E+15---1,292--14.618%
2016-12-17T00:42:36kanaanManual testing100000020000006---2.49312e-5--1.092%
2016-12-17T00:42:36kanaanManual testing10000001000000012---3.52363e-5--1.809%
2017-01-25T13:30:22ANONYMOUSManual testing30100000000012---0.001--0.000%
2017-03-13T15:10:44James Hintz11_04_201650000000000034.0000000000024E+1412---627.0--29.458%
2019-09-21T12:56:09storm5510Manual testing24544834829196358678632012---3.078--19.583%
2020-11-10T23:37:37KuyiytereaManual testing100100000000000012---1.288--0.045%
2020-11-11T18:51:32KuyiytereaManual testing30100000000012---0.001--0.000%
2020-11-11T18:51:32KuyiytereaManual testing301000000000012---0.013--0.000%
2020-11-11T18:51:32KuyiytereaManual testing3010000000000012---0.129--0.001%
2021-02-09T20:24:52Martin ChristensenMy_New_Machine1000000080000000012---0.001--5.698%
unknown5000000000003400000000000240---627.0--29.458%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29T00:00:00ANONYMOUSv4_computers251253--0.705--
1999-12-08T00:00:00ANONYMOUSv4_computers253254--0.940--
2000-01-12T00:00:00ANONYMOUSv4_computers254255--1.879--
2000-07-12T00:00:00ANONYMOUSv4_computers?256--7.517--
2002-08-17T00:00:00Alex Kruppav4_computers?257--15.03--
2002-08-24T00:00:00Alex Kruppav4_computers?257--15.03--
2010-12-10T19:19:00monstManual testing258260--90.21--
2014-02-28T21:47:00Sid & AndyManual testing260261--120.3--
2015-06-16T22:06:00snme2pm1G1261262--240.5--
2016-02-15T08:06:50snme2pm1G1262263--768.7--
2017-03-22T15:27:10Ducho_YYZManual testing263264--1,537--
2017-08-15T04:14:08Ducho_YYZManual testing264265--2,926--
2018-05-29T04:45:19Andriy MakukhaManual testing265266--5,852--
2018-06-03T15:38:54Andriy MakukhaManual testing266267--11,704--
2020-12-17T09:15:45Ruslan BorisovManual testing267268--23,407--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
12012010,1000.000
12080001,300,0000.047
8008001502.76790e-5
10001000012.40618e-7
10001000001003.40218e-5
100010000002000.000
2000200000251.70109e-5
500050000015,0000.026
800080001500.000
10000100001,0000.002
10000500001,0000.002
1000010000002000.001
11000110000011,6200.043
2500010000003000.002
3333398434710,0000.087
34543998434710,0000.190
50000500002,5010.029
50000100000030,3000.381
50000500000069,1671.177
500001275000050,0001.279
50000500000003700.025
80000800000016,8000.457
10000010000001000.002
1000001000000026.80435e-5
12345665432100020.002
25000025000050.000
2500002500000012,2171.039
50000050000010,0001.153
50000050000001000.012
500000150000005000.066
7518223759110050.001
10000001000000137,10231.62
100000020000001000.023
100000010000000107,00625.75
10000001000000004,8761.659
1000000100000000010,00413.37
1000000100000000000101.109
2000000200000010.000
3000000300000010,0006.920
3000000300000000250.026
500000050000000000010.554
100000001000000010.002
1000000020000000250.058
100000001000000001,0002.406
100000002000000001,0002.517
100000002500000001000.257
10000000100000000070.024
110000001100000030.008
11000000110000000030.011
13910666139106660030.014
1391139113911391139171.100
233596952335969500500.397
4300000019910372665010.230
4400000044000000430.436
4400000028282926673630.969
54875487948794874876.186
564734567354623632620.189
9000000090000000030.065
10000000010000000001002.406
1000000003000000000020.112
11000000011000000030.076
110000000110000000002,19582.15
123447821938203439630.116
1500000001500000000100.361
260000000260000000030.188
260000000260000000002,767244.8
260000000317855988451614,93953,441
43286574398745365458411.192
45000000050000000000000155.44
5646813216461321684932214.56
7530000003000000000010.206
8000000008000000002,112389.7
80000000090000000010.185
80000000080000000002,000385.0
8000000008000000000043,64411,879
80000000012000000000010.316
80000000050000000000053.685
80000000010000000000000111.25
800000000129964630095482093,044
800000000158925826059161,70630,318
8000000002224937144431620496.1
800000000259925737671783239,350
800000000389886727830781596,890
800000000500000000000005277.6
800000000519847717989781056,060
850000000850000000203.921
85000000085000000000612177.0
85000000015892628251516801,423
85000000025427811509116128.34
8800000008800000000061.796
900000000900000000408.304
9000000009000000000015045.93
9000000001589267960281640711.8
95000000095000000018440.32
950000000190711253733168170.6
950000000259927029262081353,913
95000000038988801942108143.37
95000000051984912699738157.75
9500000005254980905791214817.2
999999999999999990017542.11
999999999999999999008,5142,897
1000000000100000000023453.97
10000000001000000000006120.75
100000000021400000000062.798
1000000000190711767246167,037150,133
1000000000259927616348581574,552
11000000001100000000102.537
11000000002599286731042810290.2
114514191911451419190010.390
120000000012000000006818.82
120000000012000000000020.817
12000000002542816526251610284.2
12000000002599296124426828813.1
1200000000389890720018985217.1
12345678901234567890360102.5
1234567890500000000000008444.9
1234567890666000000000002,215163,881
130000000013000000000031.327
14000000001400000000175.490
140000000038989259869578286.94
1400000000105099733765962151,749
150000000015000000002,9671,027
15000000003898936554514825911,264
1500000000105099826286082637,349
1600000000160000000010338.01
160000000038989459478988693,003
160000000051985570236618352,026
1600000000105099918806202141,633
1700000000170000000017367.84
1700000000389895651545581285,573
170000000051985664170458181,043
1700000000100000000000000212,332
17000000001051000344563524466.8
1800000000180000000016468.09
18000000002000000000000016360.7
180000000051985758104298181,043
180000000080000000000000302,668
180000000085000000000000151,417
1800000000100000000000000262,888
1800000000105100126976472151,751
1800000000157649589083922152,623
1800000000200000000000000296,431
1900000000190000000041.753
1900000000519858637798684231.9
200000000020000000007132.75
2000000000200000000000200136.1
2000000000519859694554385289.9
200000000085000000000000151,418
2000000000100000000000000293,223
2000000000105100335146742222,569
2100000000210000000020.969
2100000000519860633892782116.0
2200000000220000000021.015
2200000000649822798224782144.8
225225000022522500000053.831
2300000000230000000021.061
2300000000649823620145882144.9
2400000000240000000094.982
240000000024000000000097.349
2400000000649824676901582144.9
25000000002500000000137.496
250000000050000000000001,0716,541
25000000002000000000000044310,059
2500000000779786606398982173.7
290000000029000000009362.21
2900000000290000000000160157.9
290000000070000000000000201,563
2900000000826409651067161,988183,137
290000000090975170616348414,155
29000000001051012372179121,762206,113
3000000000300000000032.076
350000000035000000000011.191
360000000036000000003125.74
3600000000105101931118812101,171
3600000000157651393226262111,928
3600000000210200832203682102,334
4000000000400000000000400544.3
400000000080000000000011.804
450000000045000000009194.45
4500000000675000000011.040
45000000007000000000000011863.5
4500000000105102833189982111,291
45000000001559572743128581173.6
45000000001576522952974325877.5
4500000000194945583102288102,168
4500000000210201734274852327,477
4500000000315300658489752113,850
4500000000420399559574622104,663
600000000060000000006083.04
690000000071000000000012.370
80000000008000000000001335.38
867530999986753099999925.903
100000000003000000000024.657
10000000000100000000000013.402
110000000005000000000003324.18
20000000000200000000000016.804
2252250000022522500000015.419
2500000000025000000000000133.41
800000000008000000000000254.43
9999999990099999999900003102.1
100000000000100000000000123.07
10000000000010000000000000134.02
150000000000150000000000269.20
2500000000001000000000000158.49
1000000000000100000000000000011,336