Optimize FACTOR_FINDER trial division

The release (only) makes an improvement in FACTOR_FINDER trial division efficiency for sieving smooth residues.

Full Changelog: v6.5.1...v6.5.2

sha1sum results:
2f7c6017c3c0f78059a06316a17ce42522e80967 FindAFactor-6.5.2-cp310-cp310-manylinux_2_35_x86_64.whl
51ebe8c222c683f720964e3212b44057433794b1 FindAFactor-6.5.2-cp312-cp312-manylinux_2_39_x86_64.whl
64cc36e4bb62a2381446b71dab513b2265d30b2b FindAFactor-6.5.2-cp312-cp312-win_amd64.whl
04cd03274c809d983f2dca026e34e304ba39dd67 FindAFactor-6.5.2-cp313-cp313-macosx_13_0_x86_64.whl
8b7aa39bb3f9618dbb4277f95bdda777c5b09e2e FindAFactor-6.5.2-cp313-cp313-macosx_14_0_arm64.whl
62dc3c0c59c66ae607fb703911a0811fb2352651 FindAFactor-6.5.2-cp313-cp313-macosx_15_0_arm64.whl
52f7b14350a43f2be26576cfcb3fafea46be7402 FindAFactor-6.5.2-cp38-cp38-manylinux_2_31_x86_64.whl
d604cbd49eb1520a242ded8fe94109ccbc937843 findafactor-6.5.2.tar.gz