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    No 51 is not prime. Using the divisibility test for 3 you can see that 51 is divisible by 3 because the sum of 5 and 1 is divisible  by 3. Because 51 has more than 2 factors it is composite.
    1 0

    Shortstax 

    answered 11 months ago

      No
      Here is a table of all prime numbers up to 1,000:






      2
      3
      5
      7
      11
      13
      17
      19
      23

      29
      31
      37
      41
      43
      47
      53
      59
      61
      67

      71
      73
      79
      83
      89
      97
      101
      103
      107
      109

      113
      127
      131
      137
      139
      149
      151
      157
      163
      167

      173
      179
      181
      191
      193
      197
      199
      211
      223
      227

      229
      233
      239
      241
      251
      257
      263
      269
      271
      277

      281
      283
      293
      307
      311
      313
      317
      331
      337
      347

      349
      353
      359
      367
      373
      379
      383
      389
      397
      401

      409
      419
      421
      431
      433
      439
      443
      449
      457
      461

      463
      467
      479
      487
      491
      499
      503
      509
      521
      523

      541
      547
      557
      563
      569
      571
      577
      587
      593
      599

      601
      607
      613
      617
      619
      631
      641
      643
      647
      653

      659
      661
      673
      677
      683
      691
      701
      709
      719
      727

      733
      739
      743
      751
      757
      761
      769
      773
      787
      797

      809
      811
      821
      823
      827
      829
      839
      853
      857
      859

      863
      877
      881
      883
      887
      907
      911
      919
      929
      937

      941
      947
      953
      967
      971
      977
      983
      991
      997

      0 0

      Annieb 

      answered 11 months ago

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