Four-Digit Prime Numbers by Tens (Part 6: 6000-7000)

You will be given four four-digit numbers that differ only by the last digit being 1, 3, 7, or 9. Answer which ones are prime numbers.
Example: If you are given "21, 23, 27, 29", only 23 and 29 are prime numbers, so you should choose "3, 9"
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2014MELO03
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Last updated: March 29, 2025
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First submittedMarch 29, 2025
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6851, 6853, 6857, 6859
6621, 6623, 6627, 6629
6661, 6663, 6667, 6669
6731, 6733, 6737, 6739
6141, 6143, 6147, 6149
6381, 6383, 6387, 6389
6841, 6843, 6847, 6849
6451, 6453, 6457, 6459
6461, 6463, 6467, 6469
6021, 6023, 6027, 6029
6981, 6983, 6987, 6989
6071, 6073, 6077, 6079
6531, 6533, 6537, 6539
6591, 6593, 6597, 6599
6801, 6803, 6807, 6809
6351, 6353, 6357, 6359
6201, 6203, 6207, 6209
6341, 6343, 6347, 6349
6371, 6373, 6377, 6379
6091, 6093, 6097, 6099
6521, 6523, 6527, 6529
6281, 6283, 6287, 6289
6181, 6183, 6187, 6189
6991, 6993, 6997, 6999
6131, 6133, 6137, 6139
6671, 6673, 6677, 6679
6601, 6603, 6607, 6609
6771, 6773, 6777, 6779
6291, 6293, 6297, 6299
6741, 6743, 6747, 6749
6581, 6583, 6587, 6589
6421, 6423, 6427, 6429
6431, 6433, 6437, 6439
6631, 6633, 6637, 6639
6811, 6813, 6817, 6819
6721, 6723, 6727, 6729
6411, 6413, 6417, 6419
6101, 6103, 6107, 6109
6261, 6263, 6267, 6269
6331, 6333, 6337, 6339
6211, 6213, 6217, 6219
6751, 6753, 6757, 6759
6901, 6903, 6907, 6909
6611, 6613, 6617, 6619
6221, 6223, 6227, 6229
6061, 6063, 6067, 6069
6711, 6713, 6717, 6719
6641, 6643, 6647, 6649
6041, 6043, 6047, 6049
6831, 6833, 6837, 6839
6551, 6553, 6557, 6559
6881, 6883, 6887, 6889
6081, 6083, 6087, 6089
6441, 6443, 6447, 6449
6161, 6163, 6167, 6169
6271, 6273, 6277, 6279
6951, 6953, 6957, 6959
6931, 6933, 6937, 6939
6701, 6703, 6707, 6709
6761, 6763, 6767, 6769
6251, 6253, 6257, 6259
6151, 6153, 6157, 6159
6051, 6053, 6057, 6059
6231, 6233, 6237, 6239
6871, 6873, 6877, 6879
6111, 6113, 6117, 6119
6491, 6493, 6497, 6499
6361, 6363, 6367, 6369
6961, 6963, 6967, 6969
6501, 6503, 6507, 6509
6391, 6393, 6397, 6399
6891, 6893, 6897, 6899
6001, 6003, 6007, 6009
6561, 6563, 6567, 6569
6191, 6193, 6197, 6199
6241, 6243, 6247, 6249
6861, 6863, 6867, 6869
6471, 6473, 6477, 6479
6921, 6923, 6927, 6929
6401, 6403, 6407, 6409
6941, 6943, 6947, 6949
6511, 6513, 6517, 6519
6781, 6783, 6787, 6789
6681, 6683, 6687, 6689
6171, 6173, 6177, 6179
6691, 6693, 6697, 6699
6821, 6823, 6827, 6829
6481, 6483, 6487, 6489
6031, 6033, 6037, 6039
6121, 6123, 6127, 6129
6011, 6013, 6017, 6019
6301, 6303, 6307, 6309
6311, 6313, 6317, 6319
6911, 6913, 6917, 6919
6571, 6573, 6577, 6579
6651, 6653, 6657, 6659
6791, 6793, 6797, 6799
6971, 6973, 6977, 6979
6541, 6543, 6547, 6549
6321, 6323, 6327, 6329
0none
11
13
17
19
21, 3
21, 7
21, 9
23, 7
23, 9
27, 9
31, 3, 7
31, 3, 9
31, 7, 9
33, 7, 9
4all
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