合数查询
8
497439到497548的合数
497439
497440
497441
497442
497443
497444
497445
497446
497447
497448
497450
497451
497452
497453
497454
497455
497456
497457
497458
497459
497460
497462
497463
497464
497465
497466
497467
497468
497469
497470
497471
497472
497474
497475
497476
497477
497478
497480
497481
497482
497483
497484
497485
497486
497487
497488
497489
497490
497492
497493
497494
497495
497496
497497
497498
497499
497500
497502
497503
497504
497505
497506
497508
497510
497511
497512
497513
497514
497515
497516
497517
497518
497519
497520
497522
497523
497524
497525
497526
497527
497528
497529
497530
497531
497532
497533
497534
497535
497536
497538
497539
497540
497541
497542
497543
497544
497545
497546
497547
497548
合数是至少有三个正因数的自然数，奇合数构成算术级数定理（狄利克雷定理）。卡迈克尔数是绝对伪素数，满足对所有基数的费马同余。合数分解是公钥密码分析的核心问题，未被证明是否属于NP完全问题。最小合数为4，唯一偶合数为2的例外。