Why so many builds?
Different CUDA versions support different hardware (compute capabilites), and different driver versions support different CUDA versions.
As such, we need multiple builds to support all the various hardware/software combinations.
GPUSieveSize and older GPUs:
Older GPUs (all GTX 1xxx and older, and any with less than 8GB RAM) may have trouble running with the current default GPUSieveSize
setting of 2047. If you have problems, set it to 128 in mfaktc.ini and try increasing it (256, 512, 1024). Higher values give slightly better performance at risk of lag (or crash) if the GPU has insufficient RAM.
Support thread:
MersenneForum
Which build do I use?
The one that matches (or is the closest less-than-or-equal-to) the CUDA version supported by your driver.
e.g. Driver supports CUDA 12.1, use the build that targets CUDA 12.0.
To check your driver's CUDA version, run
nvidia-smi
, which reports the supported CUDA version on the
first line (on driver 410.72 and newer
1 ).
If your driver is older than that, consult
this table .
Additional Linux builds: https://github.com/primesearch/mfaktc/releases/tag/0.24.0-beta.5 .
File Name File Size Date Modified Hash MD5 SHA1 SHA256 mfaktc-0.24.0-beta.5-linux64-cuda10.2.zip 950,753 2025-06-18 fb2bbffaf38b13adcc94d3011b11dc56 f02c4c337d158cf1c562cc1d1dd44ef346edf0fa 21a7243467c5837d353596ba44d3727724d828c4ae6cf36e90e13e2062d63652 mfaktc-0.24.0-beta.5-linux64-cuda8.0.zip 753,277 2025-06-18 118e574aed2c3eb5805dd8044abb676f d829f1d5fd9fdef644804a44a8f1927d2f9b55d4 0f790316a79cacf8f00cacdf50469b95c63ff4a42b3f53ea29a8d2298cb275ad mfaktc-0.24.0-beta.5-linux64-cuda9.2.zip 880,661 2025-06-18 6a2f2faff1d1f0379f31616905243074 94edf76de2be75d8d568cf3c448c3fa64fd07147 ba1b2b7cb2a1333f39149a35bebf57496a40fd6bff334bcd1b198b332ed64df6 mfaktc-0.24.0-beta.5-linux64-cuda11.0.3.zip 940,671 2025-06-18 883f505c38216661764ad64e0a3bb9f4 3f404fbeca5ff3b1b2a1af95bd403fe4dfe0ab24 5047dcea0d9af8267cfb7141b060af1245f8c08d5a497b60d0b4f7f86731e39f mfaktc-0.24.0-beta.5-linux64-cuda11.1.1.zip 1,011,757 2025-06-18 69f78dea1db39538d02e89bf83d1aeb5 f694865c8873715099d138d5c879f81e885b7609 a95d733edd745755e8f2a0b3ed2a83a0e1650b9786ad842d4d26db784fcfa9b2 mfaktc-0.24.0-beta.5-linux64-cuda11.2.2.zip 1,012,048 2025-06-18 0ce523453ca95ffbf859b89b879a3fe9 489ccd1389c76b212e69027f96e785a7cf817ef3 a0df8da41a37d963cefcdb54515d5de49ab74c5c23c85ba3b70d6b5904f6467d mfaktc-0.24.0-beta.5-linux64-cuda11.3.1.zip 1,018,015 2025-06-18 65d9bdd913d64ba94cf783013189b839 46c4e8bfabc3d56cfb3746ca13fb3a8d52d17161 95c9e4e33c82cb0ba302ad66e6569707d1d2d5b94021864c72f2eb5dc445a501 mfaktc-0.24.0-beta.5-linux64-cuda11.4.3.zip 1,060,488 2025-06-18 257fec0e1f6f11d29e80b342a7ef83e0 a64c8c22a1d8b43a60b8ac77ed904524e57c8d56 98ddf404e6ce5fb90174414cfed696e758dad97da8ed61d06381a7a862efa0ea mfaktc-0.24.0-beta.5-linux64-cuda11.5.2.zip 1,048,060 2025-06-18 20304b50df41b42f16d1ed865973828d db12b0657188105d778241d30e0816998b689665 d404449a9be4ebcb1d3250fd284d1264e28b4ec908fa7f91093c0ce0110e877e mfaktc-0.24.0-beta.5-linux64-cuda11.6.2.zip 1,049,874 2025-06-18 2f5071c9e7999dbe7ad7bf51efde34de 89c165a34821cb6572967502a469ca482f955494 2546aa49061fdc2b2f285bc68ef99c506866e358700a1d1ff94ebf3f4649110d mfaktc-0.24.0-beta.5-linux64-cuda11.7.1.zip 1,056,092 2025-06-18 b47b8693386b52f48822424f1ed82a4a b05fd73cf54f9eb1458851f48b907c0c952eed31 414de9023e5b42f5b5daa8ef05eff298452d685a12dc5b1efd2db592c9adf01f mfaktc-0.24.0-beta.5-linux64-cuda11.8.0.zip 1,157,779 2025-06-18 8edc920b064cac8a5c7c1a7854aa4c05 d4c6a28e1bbadde139193c3425dcc010a31d4c1f 42431717a2d03572727a0c73c229012c2c335e0f47f6a0b9427e20518c1a2b9a mfaktc-0.24.0-beta.5-linux64-cuda12.0.1.zip 1,078,488 2025-06-18 e006bc913b40220a820fb3f20cd251ea bc76f2c184ee1e25d477d6a1d02304598fdd9d6a 3346a887c7accbb901755de569c23b195aa684dd19d54c19c23ca15b52fd0081 mfaktc-0.24.0-beta.5-linux64-cuda12.1.1.zip 1,078,344 2025-06-18 fb861e57e5683b62cc33792f8be54959 1ede46b7a3b8dfcfc1dae39dd98074b3c881f842 b01e190d5cd95fbc5d533e37b2406b403cbb5a3d50d1e7ed1ece75dd9f69470a mfaktc-0.24.0-beta.5-linux64-cuda12.2.2.zip 1,152,193 2025-06-18 0386769f50c7a54ee1c1cff91219cfb5 4472ea881d72ccbbdf05d1d961bd06ba23438635 4715724bf1890e214054bc5339f64145747bc7c43c271e87f4cc91c4c7d7489b mfaktc-0.24.0-beta.5-linux64-cuda12.3.2.zip 1,165,455 2025-06-18 f0755d6d167d45452a9bddb624621250 f887733b7415d798f651ad87b2eb301dbacaffa5 2318c22a62f7e8e7710ee8a87d96e86fae949c7bb98c9cd1d0b7be07ee4a77cd mfaktc-0.24.0-beta.5-linux64-cuda12.4.1.zip 1,147,559 2025-06-18 5bc4154001f50870e56dce0e1a6f5469 450a33fc0de426df778bfb44b025b2f81c21cfa5 b87097633f03dbdf323b4d448d828845868418028b21fd62e1d61aab9fd21b85 mfaktc-0.24.0-beta.5-linux64-cuda12.5.1.zip 1,149,113 2025-06-18 01238263f5fcf1c7559ccec69872d80f 14275530bc3096731e94c01f410c468f37726e91 431eada604d9ed0b69d466610f38b54c393ea74921905e47d00067f9993c2089 mfaktc-0.24.0-beta.5-linux64-cuda12.6.3.zip 1,143,240 2025-06-18 ec2828269ac10ffbd240178f9bf17300 41a93a0028e1b1ab5c0ad15ca63faf00bd0ec5a1 57d9443839d63a779a4adb265e88ac5527637b05549b531b467b024de43cb5d4 mfaktc-0.24.0-beta.5-linux64-cuda12.8.1.zip 1,327,212 2025-06-18 31d0fdb97d62f09fab4f598379f5b2a4 ed2a7cb8abfb3ae9a4d36bfee288c7d2c71975a7 a02db23e5abad86c2c3f6e88c98ec6ab62fee8c45706b00f3e6261825bf303fc mfaktc-0.24.0-beta.5-linux64-cuda12.9.0.zip 1,442,845 2025-06-18 cf734875d21179c454c1a2025c4283b1 b55a9b104f60cfe3e62ea9acacb91c4f7dffffec c61f691352fd56849d0f6ec68e4716f495e11a703f78eb96e20a1cd2f3afef2d