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. 701 ( )
708 707 706 705 704 703 702
19 703 708 706 704 702
709
.7 707 5 705
.703
709 709 < 27
709 . 2, 3, 5,11,13,17,19, 23
752 ()
.( )
. 752 725 572 527 257 275
. 752 572 5 725 275
257 . . 527 = 17× 31
. 257 257 257 < 17
. 2, 3, 5, 7,11,13
٨٤