is 2 4238503103 - 1
has 1275916571 decimal digits
takes 1,147,192.072 GHz-days to do one PRP test
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27928.886059.4937%----28.886059.4937%
Target292236,634.049965.2174%200000009600000000212,689.82294.2596%449,323.872866.6990%
Difference-13-236,605.1640-5.7237%-20000000-9600000000-212,689.8229-4.2596%-449,294.9869-7.2053%

Known prime factors (6 factors, 336.6 bits, 0.00000794% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
423850310384770062071032.9811
1
2012-08-20111.353e-130.00040.0008
42385031038195230519712571549.54296676
22 × 24169
2019-07-134241692.090e-80.51830.9650
4238503103667972237031194791755.8917879813
19 × 641 × 647
2019-10-046416471.653e-60.25170.5120
4238503103315902427026721502492064.7763726580108
22 × 241 × 3865747
2021-01-1024138657470.001582.747154.38
42385031031036848076435099977592166.49112231300193
7 × 1747328599
2021-01-10717473285990.004637,36269,781
42385031031398975261166868021292166.92316503176088
23 × 33 × 73 × 17 × 13103
2021-01-10343131030.00490.40740.5232

57 Composite Factors:
P-1 results:
No P-1 results for M4238503103


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-07-1324925049.542153.20173e-9248,6146.80849e-9
2019-10-0525525655.891175.20366e-7248,6141.10656e-6
TF systematically completed to 64 but no per-exponent detailed record exists
2021-01-10slaurnocebo-165026426866.491210.0132,333,2200.027
2021-01-10slaurnocebo-165026426866.923210.0132,333,2200.027
2021-01-10slaurnocebo-165026426864.776200.0132,333,2200.027
2022-02-03ramgeisr4mg31s275276--1.805--
2022-02-06ramgeisr4mg31s276277--3.611--
2022-04-07ramgeisr4mg31s277278--7.222--
2022-04-25ramgeisr4mg31s278279--14.44--


ECM factoring results:
No ECM results for M4238503103


Lucas-Lehmer results:
No L-L results for M4238503103


PRP results:
No PRP results for M4238503103


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
279
278
277
276
268
256
250
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-07-11T14:45:05+00:00