Q: Is 125,440,128 a Prime Number?

Why is 125,440,128 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 125440128 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 19 22 24 32 33 36 38 44 48 57 64 66 72 76 88 96 99 114 128 132 144 152 171 176 192 198 209 228 264 288 304 342 352 384 396 418 456 521 528 576 608 627 684 704 792 836 912 1,042 1,056 1,152 1,216 1,254 1,368 1,408 1,563 1,584 1,672 1,824 1,881 2,084 2,112 2,432 2,508 2,736 3,126 3,168 3,344 3,648 3,762 4,168 4,224 4,689 5,016 5,472 5,731 6,252 6,336 6,688 7,296 7,524 8,336 9,378 9,899 10,032 10,944 11,462 12,504 12,672 13,376 15,048 16,672 17,193 18,756 19,798 20,064 21,888 22,924 25,008 26,752 29,697 30,096 33,344 34,386 37,512 39,596 40,128 45,848 50,016 51,579 59,394 60,192 66,688 68,772 75,024 79,192 80,256 89,091 91,696 100,032 103,158 108,889 118,788 120,384 137,544 150,048 158,384 178,182 183,392 200,064 206,316 217,778 237,576 240,768 275,088 300,096 316,768 326,667 356,364 366,784 412,632 435,556 475,152 550,176 600,192 633,536 653,334 712,728 733,568 825,264 871,112 950,304 980,001 1,100,352 1,267,072 1,306,668 1,425,456 1,650,528 1,742,224 1,900,608 1,960,002 2,200,704 2,613,336 2,850,912 3,301,056 3,484,448 3,801,216 3,920,004 5,226,672 5,701,824 6,602,112 6,968,896 7,840,008 10,453,344 11,403,648 13,937,792 15,680,016 20,906,688 31,360,032 41,813,376 62,720,064 and 125,440,128, with no remainder.

Since 125,440,128 cannot be divided by just 1 and 125,440,128, 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).