合数查询
8
499499到499606的合数
499499
499500
499501
499502
499503
499504
499505
499506
499508
499509
499510
499511
499512
499513
499514
499515
499516
499517
499518
499520
499521
499522
499524
499525
499526
499527
499528
499529
499530
499531
499532
499533
499534
499535
499536
499537
499538
499539
499540
499541
499542
499543
499544
499545
499546
499547
499548
499550
499551
499552
499553
499554
499555
499556
499557
499558
499560
499561
499562
499563
499564
499565
499566
499567
499568
499569
499570
499572
499573
499574
499575
499576
499577
499578
499579
499580
499581
499582
499583
499584
499585
499586
499587
499588
499589
499590
499592
499593
499594
499595
499596
499597
499598
499599
499600
499602
499603
499604
499605
499606
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。