AKA a great-great-gross 3,000,000 to 3,999,999 3,111,696 = 17642 = 424 3,200,000 = 205 3,263,442 = product of the first five terms of Sylvester's sequence 3,263,443 = sixth term of Sylvester's sequence 3,276,509 = Markov prime 3,301,819 = alternating factorial 3,333,333 = repdigit 3,360,633 = palindromic in 3 consecutive bases: 62818269 = 336063310 = 199599111 3,418,801 = 18492 = 434 3,426,576 = number of free 15-ominoes 3,524,578 = Fibonacci number, Markov number 3,554,688 = 2-automorphic number 3,626,149 = Wedderburn–Etherington prime 3,628,800 = 10! 3,748,096 = 19362 = 444 3,880,899/2,744,210 ≈ √2 4,000,000 to 4,999,999 4,008,004 = 20022, palindromic square 4,037,913 = sum of the first ten factorials 4,084,101 = 215 4,100,625 = 20252 = 454 4,194,304 = 20482 = 411 = 222 4,194,788 = Leyland number 4,208,945 = Leyland number 4,210,818 = equal to the sum of the seventh powers of its digits 4,213,597 = Bell number 4,260,282 = Fine number 4,297,512 = 12-th derivative of xx at x=1 4,324,320 = colossally abundant number, superior highly composite number, pronic number 4,400,489 = Markov number 4,444,444 = repdigit 4,477,456 = 21162 = 464 4,782,969 = 21872 = 97 = 314 4,782,974 = n such that n | (3n + 5) 4,785,713 = Leyland number 4,805,595 = Riordan number 4,826,809 = 21972 = 1693 = 136 4,879,681 = 22092 = 474 5,000,000 to 5,999,999 5,134,240 = the largest number that cannot be expressed as the sum of distinct fourth powers 5,153,632 = 225 5,221,225 = 22852, palindromic square 5,293,446 = Large Schröder number 5,308,416 = 23042 = 484 5,496,925 = first cyclic number in base 6 5,555,555 = repdigit 5,702,887 = Fibonacci number 5,761,455 = The number of primes under 108 5,764,801 = 24012 = 494 = 78 5,882,353 = 5882 + 23532 6,000,000 to 6,999,999 6,250,000 = 25002 = 504 6,436,343 = 235 6,536,382 = Motzkin number 6,625,109 = Pell number, Markov number 6,666,666 = repdigit 6,765,201 = 26012 = 514 6,948,496 = 26362, palindromic square 7,000,000 to 7,999,999 7,109,376 = 1-automorphic number 7,311,616 = 27042 = 524 7,453,378 = Markov number 7,529,536 = 27442 = 1963 = 146 7,652,413 = Largest n-digit pandigital prime 7,777,777 = repdigit 7,779,311 = A hit song written by Prince and released in 1982 by The Time 7,861,953 = Leyland number 7,890,481 = 28092 = 534 7,906,276 = pentagonal triangular number 7,913,837 = Keith number 7,962,624 = 245 8,000,000 to 8,999,999 8,000,000 = Used to