Four-Digit Prime Numbers by Tens (Part 8: 8000-9000)

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 30, 2025
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First submittedMarch 30, 2025
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8281, 8283, 8287, 8289
8801, 8803, 8807, 8809
8331, 8333, 8337, 8339
8481, 8483, 8487, 8489
8181, 8183, 8187, 8189
8601, 8603, 8607, 8609
8581, 8583, 8587, 8589
8961, 8963, 8967, 8969
8561, 8563, 8567, 8569
8941, 8943, 8947, 8949
8771, 8773, 8777, 8779
8191, 8193, 8197, 8199
8261, 8263, 8267, 8269
8161, 8163, 8167, 8169
8461, 8463, 8467, 8469
8901, 8903, 8907, 8909
8151, 8153, 8157, 8159
8251, 8253, 8257, 8259
8721, 8723, 8727, 8729
8141, 8143, 8147, 8149
8011, 8013, 8017, 8019
8381, 8383, 8387, 8389
8741, 8743, 8747, 8749
8831, 8833, 8837, 8839
8081, 8083, 8087, 8089
8041, 8043, 8047, 8049
8411, 8413, 8417, 8419
8051, 8053, 8057, 8059
8551, 8553, 8557, 8559
8971, 8973, 8977, 8979
8341, 8343, 8347, 8349
8311, 8313, 8317, 8319
8851, 8853, 8857, 8859
8751, 8753, 8757, 8759
8681, 8683, 8687, 8689
8891, 8893, 8897, 8899
8591, 8593, 8597, 8599
8991, 8993, 8997, 8999
8431, 8433, 8437, 8439
8781, 8783, 8787, 8789
8651, 8653, 8657, 8659
8301, 8303, 8307, 8309
8821, 8823, 8827, 8829
8541, 8543, 8547, 8549
8881, 8883, 8887, 8889
8691, 8693, 8697, 8699
8321, 8323, 8327, 8329
8511, 8513, 8517, 8519
8671, 8673, 8677, 8679
8921, 8923, 8927, 8929
8501, 8503, 8507, 8509
8131, 8133, 8137, 8139
8241, 8243, 8247, 8249
8491, 8493, 8497, 8499
8031, 8033, 8037, 8039
8111, 8113, 8117, 8119
8611, 8613, 8617, 8619
8211, 8213, 8217, 8219
8631, 8633, 8637, 8639
8861, 8863, 8867, 8869
8571, 8573, 8577, 8579
8931, 8933, 8937, 8939
8021, 8023, 8027, 8029
8621, 8623, 8627, 8629
8471, 8473, 8477, 8479
8811, 8813, 8817, 8819
8951, 8953, 8957, 8959
8121, 8123, 8127, 8129
8271, 8273, 8277, 8279
8401, 8403, 8407, 8409
8701, 8703, 8707, 8709
8221, 8223, 8227, 8229
8061, 8063, 8067, 8069
8791, 8793, 8797, 8799
8231, 8233, 8237, 8239
8201, 8203, 8207, 8209
8361, 8363, 8367, 8369
8421, 8423, 8427, 8429
8841, 8843, 8847, 8849
8911, 8913, 8917, 8919
8001, 8003, 8007, 8009
8981, 8983, 8987, 8989
8101, 8103, 8107, 8109
8451, 8453, 8457, 8459
8391, 8393, 8397, 8399
8171, 8173, 8177, 8179
8661, 8663, 8667, 8669
8441, 8443, 8447, 8449
8641, 8643, 8647, 8649
8071, 8073, 8077, 8079
8531, 8533, 8537, 8539
8711, 8713, 8717, 8719
8291, 8293, 8297, 8299
8351, 8353, 8357, 8359
8761, 8763, 8767, 8769
8371, 8373, 8377, 8379
8521, 8523, 8527, 8529
8731, 8733, 8737, 8739
8871, 8873, 8877, 8879
8091, 8093, 8097, 8099
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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