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Constants
π
Pi
e
Euler's Number
φ
Golden Ratio
√2
Square Root of 2
γ
Euler-Mascheroni
ln2
Natural Log of 2
τ
Tau
ℙ
Prime Numbers
Concepts
…
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∄
Transcendental Numbers
ℂ
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∞
Infinity
Fₙ
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Hₙ
Harmonic Series
₂₈
Number Systems
mod
Modular Arithmetic
496
Perfect Numbers
[…]
Continued Fractions
Identities & Theorems
eiπ
Euler's Identity
a²
Pythagorean Theorem
π(n)
Prime Number Theorem
∫
Fundamental Theorem
4C
Four Colour Theorem
dM
De Moivre's Theorem
Σ
Taylor Series
√π
Gaussian Integral
π/2
Wallis Product
n!
Stirling's Formula
ζ
Riemann Zeta
More Constants
π²/6
Basel Problem
G
Catalan's Constant
ζ(3)
Apéry's Constant
δ
Feigenbaum Constant
eᵖⁱ
Gelfond's Constant
g°
Golden Angle
C₂
Twin Prime Constant
ρ
Plastic Number
K₀
Khinchin's Constant
R
Ramanujan Constant
C₁₀
Champernowne
Ω
Omega Constant
δₛ
Silver Ratio
T
Tribonacci Constant
E
Erdos-Borwein
λ
Conway Constant
L
Liouville's Constant
M
Meissel-Mertens
β
Levy's Constant
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Major System
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Study Gamma Sequences
Memory lives in your fingers, not your brain. Use them.
1–6
0
5
7
7
2
1
05
⛵
Sail
77
🎂
Cake
21
🕸️
Net
7–12
5
6
6
4
9
0
56
🐛
Leech
64
🌊
Shore
90
🚌
Bus
13–18
1
5
3
2
8
6
15
🛁
Towel
32
🌙
Moon
86
🐟
Fish
19–24
0
6
0
6
5
1
06
🌿
Sage
06
🌿
Sage
51
🅿️
Lot
25–30
2
0
9
0
0
8
20
👃
Nose
90
🚌
Bus
08
🔒
Safe
31–36
2
4
0
2
4
3
24
👩⚕️
Nurse
02
☀️
Sun
43
🐏
Ram
37–42
1
0
4
2
1
5
10
🦶
Toes
42
🌧️
Rain
15
🛁
Towel
43–48
9
3
3
5
9
3
93
💣
Bomb
35
🦔
Mole
93
💣
Bomb
49–54
9
9
2
3
5
9
99
🪠
Pipe
23
🧙
Gnome
59
💋
Lip
55–60
8
8
0
5
7
6
88
🎉
Viva
05
⛵
Sail
76
📣
Coach
61–66
7
2
3
4
8
8
72
🪙
Coin
34
🐴
Mare
88
🎉
Viva
67–72
4
8
6
7
7
2
48
🏠
Roof
67
⚡
Shock
72
🪙
Coin
73–78
6
7
7
7
6
6
67
⚡
Shock
77
🎂
Cake
66
⚖️
Judge
79–84
4
6
7
0
9
3
46
⛰️
Ridge
70
🪿
Goose
93
💣
Bomb
85–90
6
9
4
7
0
6
69
🚢
Ship
47
🪨
Rock
06
🌿
Sage
91–96
3
2
9
1
7
4
32
🌙
Moon
91
🦇
Bat
74
🐦⬛
Crow
97–102
6
7
4
9
5
1
67
⚡
Shock
49
🪢
Rope
51
🅿️
Lot
103–108
4
6
3
1
4
4
46
⛰️
Ridge
31
🧤
Mitt
44
🐊
Roar
109–114
7
2
4
9
8
0
72
🪙
Coin
49
🪢
Rope
80
😊
Face
115–120
7
0
8
2
4
8
70
🪿
Goose
82
🌀
Fan
48
🏠
Roof
121–126
0
9
6
0
5
0
09
🍲
Soup
60
🏃
Chase
50
🤠
Lasso
127–132
4
0
1
4
4
8
40
🌹
Rose
14
🗼
Tower
48
🏠
Roof
133–138
6
5
4
2
8
3
65
🐚
Shell
42
🌧️
Rain
83
🫧
Foam
139–144
6
2
2
4
1
7
62
⛓️
Chain
24
👩⚕️
Nurse
17
🦆
Duck
145–150
3
9
9
7
6
4
39
🗺️
Map
97
📚
Book
64
🌊
Shore
151–156
4
9
2
3
5
3
49
🪢
Rope
23
🧙
Gnome
53
🍋
Lime
157–162
6
2
5
3
5
0
62
⛓️
Chain
53
🍋
Lime
50
🤠
Lasso
163–168
0
3
3
3
7
4
03
🧵
Seam
33
🧟
Mummy
74
🐦⬛
Crow
169–174
2
9
3
7
3
3
29
💤
Nap
37
☕
Mug
33
🧟
Mummy
175–180
7
7
3
7
6
7
77
🎂
Cake
37
☕
Mug
67
⚡
Shock
181–186
3
9
4
2
7
9
39
🗺️
Map
42
🌧️
Rain
79
🚕
Cab
187–192
2
5
9
5
2
5
25
🔨
Nail
95
🔔
Bell
25
🔨
Nail
193–198
8
2
4
7
0
9
82
🌀
Fan
47
🪨
Rock
09
🍲
Soup
199–204
4
9
1
6
0
0
49
🪢
Rope
16
🍽️
Dish
00
🍝
Sauce
205–210
8
7
3
5
2
0
87
🌫️
Fog
35
🦔
Mole
20
👃
Nose
211–216
3
9
4
8
1
6
39
🗺️
Map
48
🏠
Roof
16
🍽️
Dish
217–222
5
6
7
0
8
5
56
🐛
Leech
70
🪿
Goose
85
📁
File
223–228
3
2
3
3
1
5
32
🌙
Moon
33
🧟
Mummy
15
🛁
Towel
229–234
1
7
7
6
6
1
17
🦆
Duck
76
📣
Coach
61
🐆
Cheetah
235–240
1
5
2
8
6
2
15
🛁
Towel
28
⚓
Navy
62
⛓️
Chain
241–246
1
1
9
9
5
0
11
🐸
Toad
99
🪠
Pipe
50
🤠
Lasso
247–252
1
5
0
7
9
8
15
🛁
Towel
07
🧦
Sock
98
🥩
Beef
253–258
4
7
9
3
7
4
47
🪨
Rock
93
💣
Bomb
74
🐦⬛
Crow
259–264
5
0
8
5
7
0
50
🤠
Lasso
85
📁
File
70
🪿
Goose
265–270
5
7
4
0
0
2
57
🔐
Lock
40
🌹
Rose
02
☀️
Sun
271–276
9
9
2
1
3
5
99
🪠
Pipe
21
🕸️
Net
35
🦔
Mole
277–282
4
7
8
6
1
4
47
🪨
Rock
86
🐟
Fish
14
🗼
Tower
283–288
6
6
9
4
0
2
66
⚖️
Judge
94
🐻
Bear
02
☀️
Sun
289–294
9
6
0
4
3
2
96
🏖️
Beach
04
🩹
Sore
32
🌙
Moon
295–300
5
4
2
1
5
1
54
🎣
Lure
21
🕸️
Net
51
🅿️
Lot
301–306
9
0
5
8
7
7
90
🚌
Bus
58
🍃
Leaf
77
🎂
Cake
307–312
5
5
3
5
2
6
55
💐
Lily
35
🦔
Mole
26
🌮
Nacho
313–318
7
3
3
1
3
9
73
🪮
Comb
31
🧤
Mitt
39
🗺️
Map
319–324
9
2
5
4
0
1
92
🦴
Bone
54
🎣
Lure
01
🌱
Seed
325–330
2
9
6
7
4
2
29
💤
Nap
67
⚡
Shock
42
🌧️
Rain
331–336
0
5
1
3
7
5
05
⛵
Sail
13
⚰️
Tomb
75
🖤
Coal
337–342
4
1
3
9
5
4
41
🛣️
Road
39
🗺️
Map
54
🎣
Lure
343–348
9
1
1
1
6
8
91
🦇
Bat
11
🐸
Toad
68
🪒
Shave
349–354
5
1
0
2
8
0
51
🅿️
Lot
02
☀️
Sun
80
😊
Face
355–360
7
9
8
4
2
3
79
🚕
Cab
84
🧥
Fur
23
🧙
Gnome
361–366
4
8
7
7
5
8
48
🏠
Roof
77
🎂
Cake
58
🍃
Leaf
367–372
7
2
0
5
0
3
72
🪙
Coin
05
⛵
Sail
03
🧵
Seam
373–378
8
4
3
1
0
9
84
🧥
Fur
31
🧤
Mitt
09
🍲
Soup
379–384
3
9
9
7
3
6
39
🗺️
Map
97
📚
Book
36
🔥
Match
385–390
1
3
7
2
5
5
13
⚰️
Tomb
72
🪙
Coin
55
💐
Lily
391–396
3
0
6
0
8
8
30
🐭
Mouse
60
🏃
Chase
88
🎉
Viva
397–402
9
3
3
1
2
6
93
💣
Bomb
31
🧤
Mitt
26
🌮
Nacho
403–408
7
6
0
0
1
7
76
📣
Coach
00
🍝
Sauce
17
🦆
Duck
409–414
2
4
7
9
5
3
24
👩⚕️
Nurse
79
🚕
Cab
53
🍋
Lime
415–420
7
8
3
6
7
5
78
🕳️
Cave
36
🔥
Match
75
🖤
Coal
421–426
9
2
7
1
3
5
92
🦴
Bone
71
🐱
Cat
35
🦔
Mole
427–432
1
5
7
7
2
2
15
🛁
Towel
77
🎂
Cake
22
⛪
Nun
433–438
6
1
0
2
7
3
61
🐆
Cheetah
02
☀️
Sun
73
🪮
Comb
439–444
4
9
2
9
1
3
49
🪢
Rope
29
💤
Nap
13
⚰️
Tomb
445–450
9
4
0
7
9
8
94
🐻
Bear
07
🧦
Sock
98
🥩
Beef
451–456
4
3
0
1
0
3
43
🐏
Ram
01
🌱
Seed
03
🧵
Seam
457–462
4
1
7
7
7
1
41
🛣️
Road
77
🎂
Cake
71
🐱
Cat
463–468
7
7
8
0
8
8
77
🎂
Cake
80
😊
Face
88
🎉
Viva
469–474
1
5
4
9
5
7
15
🛁
Towel
49
🪢
Rope
57
🔐
Lock
475–480
0
6
6
1
0
7
06
🌿
Sage
61
🐆
Cheetah
07
🧦
Sock
481–486
5
0
1
0
1
6
50
🤠
Lasso
10
🦶
Toes
16
🍽️
Dish
487–492
1
9
1
6
6
3
19
🛀
Tub
16
🍽️
Dish
63
🐒
Chimp
493–498
3
4
0
1
5
2
34
🐴
Mare
01
🌱
Seed
52
🦁
Lion
499–504
2
7
8
9
3
5
27
📿
Neck
89
🎶
Vibe
35
🦔
Mole
505–510
8
6
7
9
6
5
86
🐟
Fish
79
🚕
Cab
65
🐚
Shell
511–516
4
9
7
2
5
2
49
🪢
Rope
72
🪙
Coin
52
🦁
Lion
517–522
0
3
6
2
1
2
03
🧵
Seam
62
⛓️
Chain
12
🥫
Tin
523–528
8
7
9
2
2
6
87
🌫️
Fog
92
🦴
Bone
26
🌮
Nacho
529–534
5
5
5
9
5
3
55
💐
Lily
59
💋
Lip
53
🍋
Lime
535–540
6
6
9
6
2
8
66
⚖️
Judge
96
🏖️
Beach
28
⚓
Navy
541–546
1
7
6
3
8
8
17
🦆
Duck
63
🐒
Chimp
88
🎉
Viva
547–552
7
9
2
7
2
6
79
🚕
Cab
27
📿
Neck
26
🌮
Nacho
553–558
8
0
1
3
2
4
80
😊
Face
13
⚰️
Tomb
24
👩⚕️
Nurse
559–564
3
1
0
1
0
4
31
🧤
Mitt
01
🌱
Seed
04
🩹
Sore
565–570
7
6
5
0
5
9
76
📣
Coach
50
🤠
Lasso
59
💋
Lip
571–576
6
3
7
0
3
9
63
🐒
Chimp
70
🪿
Goose
39
🗺️
Map
577–582
4
7
3
9
4
9
47
🪨
Rock
39
🗺️
Map
49
🪢
Rope
583–588
5
7
6
3
8
9
57
🔐
Lock
63
🐒
Chimp
89
🎶
Vibe
589–594
0
6
5
7
2
9
06
🌿
Sage
57
🔐
Lock
29
💤
Nap
595–600
6
7
9
2
9
6
67
⚡
Shock
92
🦴
Bone
96
🏖️
Beach
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