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Bytes	Lang	Time	Link
003	Haskell ghci	241017T025527Z	Dannyu N
nan	Zsh	220201T094248Z	pxeger
nan	PHP4	220405T082947Z	user1117
007	MATLAB	220203T155655Z	robbie c
121	Lexurgy	220201T183717Z	bigyihsu
nan	!@#$%^&*_+	220202T181939Z	Fmbalbue
nan	Python3	220202T131927Z	DialFros
7312	Malbolge	220131T104602Z	Kamila S
010	Excel	220201T015900Z	Luke Dun
063	Python 3	220201T202206Z	AnttiP
nan	Zsh	220131T170322Z	pxeger
102	Vyxal 2.8.1	220131T114256Z	lyxal
001	Jelly	220131T222819Z	caird co
024	C	220131T174914Z	pxeger
nan	JavaScript Node.js	220131T113622Z	l4m2
001	MathGolf	220131T150422Z	Kevin Cr
nan	Brainf*ck	220131T135216Z	math sca
005	Brachylog	220131T125731Z	Fatalize
nan	Seed 4791 bytes	220131T120010Z	Kamila S
005	R	220131T113645Z	Dominic
002	Charcoal	220131T110507Z	Neil

Haskell (ghci), 3 bytes, score = 423

4^7

Prints 16384.

7^5

Prints 16807.

Zsh, 13 bytes, score \$ \approx 10^{(21 \times 10^6)} \$, cracked by lynn

tr<=go -c 9 9

Outputs 13061918 9s. Try it online!

tr<=z3 -c 1 1

Outputs 21366224 1s. Try it online!

Exact score:

$$ \frac{10^{21366225} - 1}9 - 10^{13061919} + 1 $$

Explanation

<=go: load the program go, as a file
tr -c 9 9: replace all characters except 9, with 9s

The other program is similar.

z3 and go are the largest 2-character programs available on TIO, at about 22MB and 14MB respectively. We can use them as an easy source of very long "strings", and by converting all the bytes to digits, very large numbers.

I used TIO instead of ATO because it has much bigger binaries available, and also because ATO is too frequently updated, changing the binaries, so the score would change over time.

I'm not intending for this to be cracked, but I haven't tried very hard to ensure there aren't any cracks.

PHP4, score ≈ 0.011 × 10^1000

Program 1 (23 chars) output 999 times 9 :

echo str_repeat(9,999);

Program 2 (23 chars) output 999 times 8 :

echo str_repeat(8,999);

Output of both PHP4 scripts is a 999 digits integer in decimal form.

var_dump(chop($out_1, '0..9') === ''); // bool(true)
var_dump(chop($out_2, '0..9') === ''); // bool(true)

BC Math is only available if PHP was configured with --enable-bcmath, by default there is not.

MATLAB, 1.797693e+308 - 1.797047e+308 = 6.463132e+304, 7 bytes

realmax

outputs 1.797693e308

5175^83

outputs 1.797047e+308

Haskell (ghci), 3 bytes, score = 423

Zsh, 13 bytes, score \$ \approx 10^{(21 \times 10^6)} \$, cracked by lynn

Explanation

PHP4, score ≈ 0.011 × 10^1000

MATLAB, 1.797693e+308 - 1.797047e+308 = 6.463132e+304, 7 bytes

Lexurgy, score \$11111111111111111\$, 121 bytes

Program 1:

Program 2:

Minimal answer: score \$9-8=1\$, 8 bytes

!@#$%^&*()_+, 6 bytes, score: 1001001, Cracked by emanresu

Python3, 41 bytes, score=\$2.82×10^{456573}-2.82×10^{446573}\$, Cracked

Malbolge, 7 bytes. Score: 3 - 1 = 2. Cracked.

Excel, 10 bytes, score (145!)-(144!) 0 Cracked!

Excel, 10 bytes, score (999999999!)-(999999998!)

Python 3, 63 bytes, score \$2\rightarrow12\rightarrow(9^{99}-1)-2\rightarrow11\rightarrow(9^{99}-1)\$

Zsh, 1 byte, score 124, provably uncrackable

Vyxal 2.8.1, online edition, Score: \$no\$, 102 bytes - cracked

Jelly, \$1000 - 256 = 744\$, 1 byte

C, 24 bytes, score 33482810471

JavaScript (Node.js), 22 bytes, Score=\$\frac 19\times 10^{10000000}-\frac 19\$, cracked

brainfuck, 19 bytes, Score=\$3\times 10^{254}\$, unlikely crackable

MathGolf, 1 byte, score 100000000-10000000=90000000

Brainf*ck, 25 bytes. Score = 7 - 4 = 3, cracked by Fmbalbuena

Brachylog, 5 bytes, score = 61803398875 - 14159265359 = 47644133516

Explanation

Seed 4791 bytes, 9^9^9^9^9^9^9^9^9^9^9 - 9^999

R, 5 bytes, score: 10^307

R, 4 bytes, score: 9 x 10^98, cracked, almost instantly

Charcoal, 2 bytes, score: 1000 - 99 = 901