Top Mersenne exponents with the most known factors:
Exponent range: - , number of factors between and

Known
Factors
Exponent
Count
113
106
943
8248
71,759
613,825
589,577
4485,927
Exponent # Known FactorsSum Bitsize of Known Factors Largest factor (bits) % Known PrimeNetGPU72actual
M3,356,318,9399445.7179.660.0000132798%287 291280
M4,057,374,6919416.4660.430.0000102644%288 292284

M4318431.00230.0799.9999952223%240 244
M7018701.00462.9099.9999997519%240 244
M1,00981,009.00382.66100.0000000000%240 244
M1,08781,087.00433.7699.9998987754%240 244
M2,6578384.49136.0514.4707188559%240 244
M3,7678423.82151.5611.2507300239%240 244
M3,7798311.5570.828.2441915851%240 244
M4,9338337.4878.256.8412122441%240 244
M5,9038371.26100.366.2892596985%240 244
M9,6018375.5590.783.9115717113%240 244
M20,4798455.78113.222.2255920699%240 244
M55,3438364.1580.240.6579874600%240 244
M110,5438384.9289.290.3482065802%240 244
M125,4298270.1678.620.2153847994%240 244
M128,8318409.0884.950.3175307185%240 244
M136,7338395.5096.500.2892483892%240 244
M177,0118424.9091.960.2400404495%240 244
M194,6538368.1777.180.1891391348%240 244
M209,5638350.7992.460.1673930990%240 244
M229,7118459.11107.550.1998641772%240 244
M421,6998399.0278.240.0946222305%240 244
M435,6798425.2476.820.0976048880%240 244
M444,7138359.4381.330.0808235873%240 244
M473,2198457.8277.730.0967459041%240 244
M651,7318345.2857.780.0529784528%240 244
M885,8038394.9582.310.0445865503%240 244
M1,156,8078426.5683.700.0368734802%256 260
M1,313,3638324.7069.420.0247228679%256 260
M1,330,2238374.6979.060.0281671569%256 260
M2,171,1598302.7356.590.0139432441%258 262
M2,329,0818308.4174.590.0132416176%258 262
M3,658,2838357.0575.430.0097599065%260 264
M5,049,9598295.0052.510.0058415326%261 265
M7,788,2598331.4158.650.0042552771%263 267
M9,194,6598342.3757.490.0037236182%264 268
M9,532,3318320.3762.030.0033608359%264 268
M9,971,1478332.2362.450.0033318735%264 268
M10,172,7178364.1562.910.0035796533%264 268
M18,261,8638351.4462.000.0019244477%265 269
M20,848,5598362.5463.110.0017389115%265 269
M20,882,1798366.7162.600.0017561003%265 269
M23,110,5678357.3858.730.0015463835%265 269
M24,165,8098372.7763.770.0015425347%266 270
M25,434,4638363.7558.470.0014301344%266 270
M28,070,0718331.7357.230.0011817747%266 270
M38,118,7378334.3070.520.0008769887%267 271
M39,183,1218290.4047.810.0007411278%268 272
M39,905,5198359.4555.760.0009007526%268 272
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