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diff --git a/circuitpython/py/mpz.h b/circuitpython/py/mpz.h
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_PY_MPZ_H
+#define MICROPY_INCLUDED_PY_MPZ_H
+
+#include <stdint.h>
+
+#include "py/mpconfig.h"
+#include "py/misc.h"
+
+// This mpz module implements arbitrary precision integers.
+//
+// The storage for each digit is defined by mpz_dig_t.  The actual number of
+// bits in mpz_dig_t that are used is defined by MPZ_DIG_SIZE.  The machine must
+// also provide a type that is twice as wide as mpz_dig_t, in both signed and
+// unsigned versions.
+//
+// MPZ_DIG_SIZE can be between 4 and 8*sizeof(mpz_dig_t), but it makes most
+// sense to have it as large as possible.  If MPZ_DIG_SIZE is not already
+// defined then it is auto-detected below, depending on the machine.  The types
+// are then set based on the value of MPZ_DIG_SIZE (although they can be freely
+// changed so long as the constraints mentioned above are met).
+
+#ifndef MPZ_DIG_SIZE
+  #if defined(__x86_64__) || defined(_WIN64)
+// 64-bit machine, using 32-bit storage for digits
+    #define MPZ_DIG_SIZE (32)
+  #else
+// default: 32-bit machine, using 16-bit storage for digits
+    #define MPZ_DIG_SIZE (16)
+  #endif
+#endif
+
+#if MPZ_DIG_SIZE > 16
+#define MPZ_DBL_DIG_SIZE (64)
+typedef uint32_t mpz_dig_t;
+typedef uint64_t mpz_dbl_dig_t;
+typedef int64_t mpz_dbl_dig_signed_t;
+#elif MPZ_DIG_SIZE > 8
+#define MPZ_DBL_DIG_SIZE (32)
+typedef uint16_t mpz_dig_t;
+typedef uint32_t mpz_dbl_dig_t;
+typedef int32_t mpz_dbl_dig_signed_t;
+#elif MPZ_DIG_SIZE > 4
+#define MPZ_DBL_DIG_SIZE (16)
+typedef uint8_t mpz_dig_t;
+typedef uint16_t mpz_dbl_dig_t;
+typedef int16_t mpz_dbl_dig_signed_t;
+#else
+#define MPZ_DBL_DIG_SIZE (8)
+typedef uint8_t mpz_dig_t;
+typedef uint8_t mpz_dbl_dig_t;
+typedef int8_t mpz_dbl_dig_signed_t;
+#endif
+
+#ifdef _WIN64
+  #ifdef __MINGW32__
+    #define MPZ_LONG_1 1LL
+  #else
+    #define MPZ_LONG_1 1i64
+  #endif
+#else
+  #define MPZ_LONG_1 1L
+#endif
+
+// these define the maximum storage needed to hold an int or long long
+#define MPZ_NUM_DIG_FOR_INT ((sizeof(mp_int_t) * 8 + MPZ_DIG_SIZE - 1) / MPZ_DIG_SIZE)
+#define MPZ_NUM_DIG_FOR_LL ((sizeof(long long) * 8 + MPZ_DIG_SIZE - 1) / MPZ_DIG_SIZE)
+
+typedef struct _mpz_t {
+    // Zero has neg=0, len=0.  Negative zero is not allowed.
+    size_t neg : 1;
+    size_t fixed_dig : 1;
+    size_t alloc : (8 * sizeof(size_t) - 2);
+    size_t len;
+    mpz_dig_t *dig;
+} mpz_t;
+
+// convenience macro to declare an mpz with a digit array from the stack, initialised by an integer
+#define MPZ_CONST_INT(z, val) mpz_t z; mpz_dig_t z##_digits[MPZ_NUM_DIG_FOR_INT]; mpz_init_fixed_from_int(&z, z_digits, MPZ_NUM_DIG_FOR_INT, val);
+
+void mpz_init_zero(mpz_t *z);
+void mpz_init_from_int(mpz_t *z, mp_int_t val);
+void mpz_init_fixed_from_int(mpz_t *z, mpz_dig_t *dig, size_t dig_alloc, mp_int_t val);
+void mpz_deinit(mpz_t *z);
+
+void mpz_set(mpz_t *dest, const mpz_t *src);
+void mpz_set_from_int(mpz_t *z, mp_int_t src);
+void mpz_set_from_ll(mpz_t *z, long long i, bool is_signed);
+#if MICROPY_PY_BUILTINS_FLOAT
+void mpz_set_from_float(mpz_t *z, mp_float_t src);
+#endif
+size_t mpz_set_from_str(mpz_t *z, const char *str, size_t len, bool neg, unsigned int base);
+void mpz_set_from_bytes(mpz_t *z, bool big_endian, size_t len, const byte *buf);
+
+static inline bool mpz_is_zero(const mpz_t *z) {
+    return z->len == 0;
+}
+static inline bool mpz_is_neg(const mpz_t *z) {
+    return z->neg != 0;
+}
+int mpz_cmp(const mpz_t *lhs, const mpz_t *rhs);
+
+void mpz_abs_inpl(mpz_t *dest, const mpz_t *z);
+void mpz_neg_inpl(mpz_t *dest, const mpz_t *z);
+void mpz_not_inpl(mpz_t *dest, const mpz_t *z);
+void mpz_shl_inpl(mpz_t *dest, const mpz_t *lhs, mp_uint_t rhs);
+void mpz_shr_inpl(mpz_t *dest, const mpz_t *lhs, mp_uint_t rhs);
+void mpz_add_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_sub_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_mul_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_pow_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_pow3_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs, const mpz_t *mod);
+void mpz_and_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_or_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_xor_inpl(mpz_t *dest, const mpz_t *lhs, const mpz_t *rhs);
+void mpz_divmod_inpl(mpz_t *dest_quo, mpz_t *dest_rem, const mpz_t *lhs, const mpz_t *rhs);
+
+static inline size_t mpz_max_num_bits(const mpz_t *z) {
+    return z->len * MPZ_DIG_SIZE;
+}
+static inline size_t mpz_num_bits(const mpz_t *z) {
+    if (mpz_is_zero(z)) {
+        return 0;
+    }
+    size_t last_bits = (8 * (sizeof(long) - sizeof(mpz_dig_t))) - __builtin_clzl(z->dig[z->len - 1]);
+    return z->len * MPZ_DIG_SIZE + last_bits;
+}
+mp_int_t mpz_hash(const mpz_t *z);
+bool mpz_as_int_checked(const mpz_t *z, mp_int_t *value);
+bool mpz_as_uint_checked(const mpz_t *z, mp_uint_t *value);
+void mpz_as_bytes(const mpz_t *z, bool big_endian, size_t len, byte *buf);
+#if MICROPY_PY_BUILTINS_FLOAT
+mp_float_t mpz_as_float(const mpz_t *z);
+#endif
+size_t mpz_as_str_inpl(const mpz_t *z, unsigned int base, const char *prefix, char base_char, char comma, char *str);
+
+#endif // MICROPY_INCLUDED_PY_MPZ_H