Numbers 4200-4299

A page of the Numeropedia - the Special Encyclopedia of Numbers

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4,200

[Geology]  The length (feet) of the main span (between its 2 supporting poles/posts) of the Golden Gate Bridge, the suspension bridge connecting San Francisco and Marin County, California, opened for vehicular traffic on 8 May 1937. It was designed by Joseph B. Strauss and cost U.S. \$35.5 million.

4,224

[Math.]

 66×64 = 4224 66×67 = 4422 66×68 = 4488 66×69 = 4554 66×74 = 4884

 666×661 = 440,226 666×666 = 443,556 666×669 = 445,554 666×672 = 447,552 666×663 = 441,558 666×667 = 444,222 666×670 = 446,220 666×674 = 448,884 666×664 = 442,224 666×668 = 444,888 666×671 = 446,886 666×675 = 449,550

… (generalizable pattern) …

4,225

[Math.]  The smallest square number, which is the sum of 2 different square numbers in 2 ways: 4225 = 652 = 632+162 = 562+332.

[Math.]  Repeatedly inserting numbers 42 between the digits 4 and 2 in the square number 4225 = 652 yields other squares 442225 = 6652, 44422225 = 66652, 444222225 = 666652, 44442222225 = 6666652

4,231

[Sport]  One of soccer’s possible lineup tactics formations: 4-2-4 (4 defenders, 2 midfielders and 4 forwards). A slightly modified defenders line makes: 1-3-2-4 (1 sweeper), or 3-1-2-4 (1 stopper). A slightly modified forwards line makes: 4-2-3-1 (1 striker). Also, a slightly modified midfielders line from formation 4-5-1: 4-2-3-1 (1 striker) or (Christmas Tree) 4-3-2-1 (1 striker).

4,243

[Math.]  4243 = 444+22+444+3333.

4,253

[Math.]  A prime number.  A Mersenne exponent: 24253–1 is the 19th Mersenne prime number.

4,256

[Math.]  65242 = 42,562,576, starting with the root number backward, 4256.

4,260

[Math.]  The number of left-truncatable prime numbers.

The largest one is: 357,686,312,646,216,567,629,137.

4,278

[Math.]  A triangular number (sum of all integers from 1 to 92): 4278 = 1+2+…+91+92.