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