The list would be a bit long to copy here; you can find lists of prime numbers with a simple search on the internet. Or you might go to Wolfram Alpha and type "4-digit prime numbers" as the input.
Here are the first 300 4-digit prime numbers:
1009 1013 1019 1021 1031 1033 1039 1049 1051 1061
1063 1069 1087 1091 1093 1097 1103 1109 1117 1123
1129 1151 1153 1163 1171 1181 1187 1193 1201 1213
1217 1223 1229 1231 1237 1249 1259 1277 1279 1283
1289 1291 1297 1301 1303 1307 1319 1321 1327 1361
1367 1373 1381 1399 1409 1423 1427 1429 1433 1439
1447 1451 1453 1459 1471 1481 1483 1487 1489 1493
1499 1511 1523 1531 1543 1549 1553 1559 1567 1571
1579 1583 1597 1601 1607 1609 1613 1619 1621 1627
1637 1657 1663 1667 1669 1693 1697 1699 1709 1721
1723 1733 1741 1747 1753 1759 1777 1783 1787 1789
1801 1811 1823 1831 1847 1861 1867 1871 1873 1877
1879 1889 1901 1907 1913 1931 1933 1949 1951 1973
1979 1987 1993 1997 1999 2003 2011 2017 2027 2029
2039 2053 2063 2069 2081 2083 2087 2089 2099 2111
2113 2129 2131 2137 2141 2143 2153 2161 2179 2203
2207 2213 2221 2237 2239 2243 2251 2267 2269 2273
2281 2287 2293 2297 2309 2311 2333 2339 2341 2347
2351 2357 2371 2377 2381 2383 2389 2393 2399 2411
2417 2423 2437 2441 2447 2459 2467 2473 2477 2503
2521 2531 2539 2543 2549 2551 2557 2579 2591 2593
2609 2617 2621 2633 2647 2657 2659 2663 2671 2677
2683 2687 2689 2693 2699 2707 2711 2713 2719 2729
2731 2741 2749 2753 2767 2777 2789 2791 2797 2801
2803 2819 2833 2837 2843 2851 2857 2861 2879 2887
2897 2903 2909 2917 2927 2939 2953 2957 2963 2969
2971 2999 3001 3011 3019 3023 3037 3041 3049 3061
3067 3079 3083 3089 3109 3119 3121 3137 3163 3167
3169 3181 3187 3191 3203 3209 3217 3221 3229 3251
3253 3257 3259 3271 3299 3301 3307 3313 3319 3323
3329 3331 3343 3347 3359 3361 3371 3373 3389 3391
The ratio of the number of one-digit prime numbers to the number of one-digit composite numbers is one to one. The one-digit prime numbers are 2, 3, 5, and 7. The one-digit composite numbers are 4, 6, 8, and 9. Therefor, the ratio is 4:4, which simplifies to 1:1.
3 41 43 47
NO!!!! Other than '2' all prime numbers are odd numbers. 4,6,10 & 20 are all even so they are not prime numbers.
all of these are except 4. 4 is not a prime number!
The least 1 digit number that is composite is 4. It is because all numbers before that are prime.
24 of them.
The ratio of the number of one-digit prime numbers to the number of one-digit composite numbers is one to one. The one-digit prime numbers are 2, 3, 5, and 7. The one-digit composite numbers are 4, 6, 8, and 9. Therefor, the ratio is 4:4, which simplifies to 1:1.
It is: 1013
7532
4/4 = 1
2, 3, 5, And 7 are the first 4 prime numbers
3 digit numbers are lessthan 4 digit numbers
7532
4: 2, 3, 5 and 7. 1 is not a prime.
there are 4
3 41 43 47
You had me until "product." The product of 4 digits can't be prime.