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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6921, 6923, 6927, 6929
6781, 6783, 6787, 6789
6111, 6113, 6117, 6119
6671, 6673, 6677, 6679
6131, 6133, 6137, 6139
6011, 6013, 6017, 6019
6771, 6773, 6777, 6779
6721, 6723, 6727, 6729
6991, 6993, 6997, 6999
6931, 6933, 6937, 6939
6381, 6383, 6387, 6389
6321, 6323, 6327, 6329
6761, 6763, 6767, 6769
6441, 6443, 6447, 6449
6191, 6193, 6197, 6199
6221, 6223, 6227, 6229
6821, 6823, 6827, 6829
6431, 6433, 6437, 6439
6351, 6353, 6357, 6359
6791, 6793, 6797, 6799
6491, 6493, 6497, 6499
6731, 6733, 6737, 6739
6901, 6903, 6907, 6909
6331, 6333, 6337, 6339
6071, 6073, 6077, 6079
6141, 6143, 6147, 6149
6511, 6513, 6517, 6519
6121, 6123, 6127, 6129
6021, 6023, 6027, 6029
6531, 6533, 6537, 6539
6371, 6373, 6377, 6379
6171, 6173, 6177, 6179
6811, 6813, 6817, 6819
6201, 6203, 6207, 6209
6961, 6963, 6967, 6969
6971, 6973, 6977, 6979
6651, 6653, 6657, 6659
6941, 6943, 6947, 6949
6681, 6683, 6687, 6689
6301, 6303, 6307, 6309
6451, 6453, 6457, 6459
6831, 6833, 6837, 6839
6261, 6263, 6267, 6269
6801, 6803, 6807, 6809
6741, 6743, 6747, 6749
6871, 6873, 6877, 6879
6891, 6893, 6897, 6899
6701, 6703, 6707, 6709
6571, 6573, 6577, 6579
6981, 6983, 6987, 6989
6411, 6413, 6417, 6419
6041, 6043, 6047, 6049
6881, 6883, 6887, 6889
6711, 6713, 6717, 6719
6271, 6273, 6277, 6279
6911, 6913, 6917, 6919
6951, 6953, 6957, 6959
6161, 6163, 6167, 6169
6091, 6093, 6097, 6099
6391, 6393, 6397, 6399
6591, 6593, 6597, 6599
6691, 6693, 6697, 6699
6751, 6753, 6757, 6759
6841, 6843, 6847, 6849
6601, 6603, 6607, 6609
6341, 6343, 6347, 6349
6281, 6283, 6287, 6289
6151, 6153, 6157, 6159
6481, 6483, 6487, 6489
6051, 6053, 6057, 6059
6471, 6473, 6477, 6479
6251, 6253, 6257, 6259
6641, 6643, 6647, 6649
6851, 6853, 6857, 6859
6501, 6503, 6507, 6509
6621, 6623, 6627, 6629
6001, 6003, 6007, 6009
6241, 6243, 6247, 6249
6551, 6553, 6557, 6559
6861, 6863, 6867, 6869
6291, 6293, 6297, 6299
6061, 6063, 6067, 6069
6181, 6183, 6187, 6189
6211, 6213, 6217, 6219
6561, 6563, 6567, 6569
6031, 6033, 6037, 6039
6461, 6463, 6467, 6469
6421, 6423, 6427, 6429
6311, 6313, 6317, 6319
6521, 6523, 6527, 6529
6401, 6403, 6407, 6409
6541, 6543, 6547, 6549
6581, 6583, 6587, 6589
6611, 6613, 6617, 6619
6631, 6633, 6637, 6639
6661, 6663, 6667, 6669
6361, 6363, 6367, 6369
6081, 6083, 6087, 6089
6101, 6103, 6107, 6109
6231, 6233, 6237, 6239
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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