Q: Is 42,000,120 a Prime Number?

 A: No, 42,000,120 is not a prime number.

Why is 42,000,120 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 42000120 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 29 30 36 40 45 54 58 60 72 81 87 90 108 116 120 135 145 149 162 174 180 216 232 243 261 270 290 298 324 348 360 405 435 447 486 522 540 580 596 648 696 745 783 810 870 894 972 1,044 1,080 1,160 1,192 1,215 1,305 1,341 1,490 1,566 1,620 1,740 1,788 1,944 2,088 2,235 2,349 2,430 2,610 2,682 2,980 3,132 3,240 3,480 3,576 3,915 4,023 4,321 4,470 4,698 4,860 5,220 5,364 5,960 6,264 6,705 7,047 7,830 8,046 8,642 8,940 9,396 9,720 10,440 10,728 11,745 12,069 12,963 13,410 14,094 15,660 16,092 17,284 17,880 18,792 20,115 21,605 23,490 24,138 25,926 26,820 28,188 31,320 32,184 34,568 35,235 36,207 38,889 40,230 43,210 46,980 48,276 51,852 53,640 56,376 60,345 64,815 70,470 72,414 77,778 80,460 86,420 93,960 96,552 103,704 116,667 120,690 129,630 140,940 144,828 155,556 160,920 172,840 181,035 194,445 233,334 241,380 259,260 281,880 289,656 311,112 350,001 362,070 388,890 466,668 482,760 518,520 583,335 700,002 724,140 777,780 933,336 1,050,003 1,166,670 1,400,004 1,448,280 1,555,560 1,750,005 2,100,006 2,333,340 2,800,008 3,500,010 4,200,012 4,666,680 5,250,015 7,000,020 8,400,024 10,500,030 14,000,040 21,000,060 and 42,000,120, with no remainder.

Since 42,000,120 cannot be divided by just 1 and 42,000,120, it is not a prime number.


More Examples

  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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