Four-Digit Prime Numbers by Tens (Part 7: 7000-8000)

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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7631, 7633, 7637, 7639
7051, 7053, 7057, 7059
7441, 7443, 7447, 7449
7171, 7173, 7177, 7179
7621, 7623, 7627, 7629
7151, 7153, 7157, 7159
7551, 7553, 7557, 7559
7271, 7273, 7277, 7279
7261, 7263, 7267, 7269
7761, 7763, 7767, 7769
7981, 7983, 7987, 7989
7601, 7603, 7607, 7609
7321, 7323, 7327, 7329
7461, 7463, 7467, 7469
7791, 7793, 7797, 7799
7711, 7713, 7717, 7719
7891, 7893, 7897, 7899
7701, 7703, 7707, 7709
7841, 7843, 7847, 7849
7311, 7313, 7317, 7319
7341, 7343, 7347, 7349
7731, 7733, 7737, 7739
7941, 7943, 7947, 7949
7661, 7663, 7667, 7669
7001, 7003, 7007, 7009
7031, 7033, 7037, 7039
7371, 7373, 7377, 7379
7391, 7393, 7397, 7399
7091, 7093, 7097, 7099
7161, 7163, 7167, 7169
7401, 7403, 7407, 7409
7141, 7143, 7147, 7149
7951, 7953, 7957, 7959
7181, 7183, 7187, 7189
7541, 7543, 7547, 7549
7221, 7223, 7227, 7229
7201, 7203, 7207, 7209
7291, 7293, 7297, 7299
7771, 7773, 7777, 7779
7411, 7413, 7417, 7419
7811, 7813, 7817, 7819
7961, 7963, 7967, 7969
7531, 7533, 7537, 7539
7671, 7673, 7677, 7679
7971, 7973, 7977, 7979
7741, 7743, 7747, 7749
7581, 7583, 7587, 7589
7021, 7023, 7027, 7029
7011, 7013, 7017, 7019
7831, 7833, 7837, 7839
7561, 7563, 7567, 7569
7471, 7473, 7477, 7479
7481, 7483, 7487, 7489
7521, 7523, 7527, 7529
7691, 7693, 7697, 7699
7801, 7803, 7807, 7809
7921, 7923, 7927, 7929
7211, 7213, 7217, 7219
7451, 7453, 7457, 7459
7231, 7233, 7237, 7239
7781, 7783, 7787, 7789
7501, 7503, 7507, 7509
7901, 7903, 7907, 7909
7351, 7353, 7357, 7359
7721, 7723, 7727, 7729
7821, 7823, 7827, 7829
7111, 7113, 7117, 7119
7381, 7383, 7387, 7389
7121, 7123, 7127, 7129
7131, 7133, 7137, 7139
7071, 7073, 7077, 7079
7511, 7513, 7517, 7519
7681, 7683, 7687, 7689
7101, 7103, 7107, 7109
7991, 7993, 7997, 7999
7041, 7043, 7047, 7049
7591, 7593, 7597, 7599
7871, 7873, 7877, 7879
7861, 7863, 7867, 7869
7431, 7433, 7437, 7439
7301, 7303, 7307, 7309
7751, 7753, 7757, 7759
7491, 7493, 7497, 7499
7611, 7613, 7617, 7619
7911, 7913, 7917, 7919
7061, 7063, 7067, 7069
7241, 7243, 7247, 7249
7081, 7083, 7087, 7089
7191, 7193, 7197, 7199
7281, 7283, 7287, 7289
7641, 7643, 7647, 7649
7851, 7853, 7857, 7859
7881, 7883, 7887, 7889
7331, 7333, 7337, 7339
7421, 7423, 7427, 7429
7251, 7253, 7257, 7259
7571, 7573, 7577, 7579
7931, 7933, 7937, 7939
7361, 7363, 7367, 7369
7651, 7653, 7657, 7659
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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