HTML Entity for Uppercase P Double Struck Capital (ℙ)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+2119

HTML Entity for uppercase P double struck capital (U+2119) tutorial illustration

Definition

What Is Uppercase P Double Struck Capital?

Uppercase P double struck capital (ℙ) is the Unicode character at U+2119 (DOUBLE-STRUCK CAPITAL P) in Letterlike Symbols — a blackboard-bold P used in mathematical notation, most often for the set of prime numbers.

Remember

Character     ℙ
Unicode       U+2119
Named entity  &Popf;  (also &primes;)
Hex entity    &#x2119;
Decimal       &#8473;
CSS escape    \2119
Not the same  P · ℘ · Ƥ · ℕ

Prefer &Popf; in HTML markup (alias &primes; also works). Numeric forms and typing ℙ in UTF-8 also work. Use a math-capable font when the blackboard-bold shape matters. Do not confuse this with plain P, script ℘, or P with hook.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	`&Popf;`	HTML markup (preferred)
Named alias	`&primes;`	HTML markup (same glyph)
Direct character	`ℙ`	HTML text (UTF-8)
Hex entity	`ℙ`	HTML markup
Decimal entity	`ℙ`	HTML markup
CSS escape	`\2119`	Stylesheet `content`

When to Use Which

Situation	Use
Prime numbers / blackboard-bold P	`&Popf;` or type `ℙ`
Natural numbers (ℕ)	ℕ (`&Nopf;`)
Script / Weierstrass P (℘)	℘ (`&weierp;`)
P with hook (Ƥ)	Ƥ (U+01A4)
Plain capital P	P (U+0050)
Generated text via `::before` / `::after`	`content: "\2119"`

See it

Live Preview

Double-struck P rendered alone and next to related symbols.

Large glyph ℙ

Math use p ∈ ℙ

Compared ℙ | P | ℘ | Ƥ | ℕ

With entities Named: ℙ | Hex: ℙ | Decimal: ℙ

Code

Complete HTML Example

One page that shows the symbol with named, hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.

Named + Hex + Decimal + CSS + Typed

Five ways to produce ℙ, plus a short prime-number membership example.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Uppercase P Double Struck Capital (ℙ)</title>
  <style>
    #point::after {
      content: "\2119";
    }
  </style>
</head>
<body>
  <p>Using Named Entity: &Popf;</p>
  <p>Using Hex Code: &#x2119;</p>
  <p>Using HTML Code: &#8473;</p>
  <p id="point">Using CSS Entity: </p>
  <p>Typed directly: ℙ</p>
  <p>Primes: p &#x2208; &Popf;</p>
</body>
</html>

Try It Yourself

How It Works

1. Named: &Popf; is the clearest HTML form for U+2119 (from “Popf” / blackboard-bold letter naming). Alias &primes; produces the same glyph.

2. Hex: U+2119 → ℙ in HTML. Same glyph as the named entity.

3. Decimal: same code point as 8473 → ℙ. Same glyph as hex and named.

4. CSS: use \2119 in content (not an HTML entity). #point::after appends that ℙ after the paragraph text.

5. Typed / math: paste ℙ in UTF-8, or write p ∈ &Popf; for a short membership label.

Pitfalls & Tips

Common mistakes when working with U+2119.

vs P

Not a plain capital P

ASCII P (U+0050) is not letterlike. Use &Popf; when you need the double-struck primes symbol.

vs ℘

Not script / Weierstrass P

℘ (&weierp;) is a script letterlike P. ℙ is double-struck. See uppercase P script capital.

vs bold

Not CSS bold

font-weight: bold only thickens a letter. U+2119 is a dedicated double-struck character.

ℙ

Alias &primes; ≠ prime mark

&primes; is an HTML5 alias for ℙ (the primes set). It is not the prime mark ′ (U+2032).

Fonts

Letterlike coverage varies

Some fonts fall back to a plain P. Prefer Cambria Math, STIX, or another math font for ℙ.

CSS vs HTML

Do not mix escapes

\2119 belongs in CSS strings. &Popf; / ℙ / ℙ belong in HTML.

Compatibility

Browser Support

Double-struck capital P (U+2119) and its entity forms (&Popf;, &primes;, ℙ, ℙ, CSS \\2119) are supported in all mainstream browsers. Visible glyphs depend on Letterlike Symbols font coverage.

✓ Universal support

Uppercase P Double Struck Capital (ℙ)

Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer IE 9+

Yes

U+2119 / &Popf; Full support

Bottom line: Prefer &Popf; in HTML. Use \\2119 only inside CSS content. Do not confuse with plain P or &weierp; (℘).

Remember

Key Takeaways

Unicode: double-struck P is U+2119 (decimal 8473) — glyph ℙ.
HTML: prefer &Popf; (also &primes;) — also ℙ / ℙ.
CSS: use \2119 inside content for generated text.
Meaning: ℙ is prime numbers / blackboard bold — not plain P, not ℘.

One line: U+2119 → &Popf; / ℙ / ℙ / CSS \2119.

Frequently Asked Questions

How do I display ℙ in HTML?

Use &Popf; (named), ℙ (hex), ℙ (decimal), type ℙ directly in UTF-8, or the CSS escape \2119 in content. Prefer &Popf; in normal HTML. Alias &primes; also works.

What is the Unicode value for double-struck capital P?

U+2119 (DOUBLE-STRUCK CAPITAL P). Hex 2119, decimal 8473. It belongs to Letterlike Symbols (U+2100–U+214F).

Is there a named HTML entity for U+2119?

Yes. Use &Popf; (preferred). Numeric forms ℙ and ℙ also work. HTML5 also defines &primes; for the same character.

Is ℙ the same as P or ℘?

No. ℙ is double-struck capital P (U+2119, &Popf;). Plain P is U+0050. ℘ is script capital P / Weierstrass p (&weierp;, U+2118).

When should I use &Popf;?

Use it in mathematical notation for the prime numbers (for example p ∈ ℙ), or whenever blackboard-bold P is required — not as a substitute for plain P.

What is the difference between HTML code and CSS entity for U+2119?

HTML entities (&Popf;, ℙ, or ℙ) go in markup. The CSS escape \2119 goes in stylesheet strings (usually content on ::before/::after).

Did you know?

Double-struck capital P is Unicode U+2119 (decimal 8473) — glyph ℙ in Letterlike Symbols (U+2100–U+214F). HTML5 names it &Popf; (also &primes;). Official name: DOUBLE-STRUCK CAPITAL P. In mathematics it usually denotes the prime numbers. Prefer a math-capable font for the blackboard-bold look.

Next: Uppercase P Hook

Learn the HTML entity for uppercase P with hook — next in this sequence.

Continue tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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